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 mondofacto - Online Medical Dictionary
Category: Health and Medicine > Medical Dictionary
Date & country: 26/01/2008, UK
Words: 116197


impale
1. To pierce with a pale; to put to death by fixing on a sharp stake. See Empale. 'Then with what life remains, impaled, and left To writhe at leisure round the bloody stake.' (Addison) ... 2. To inclose, as with pales or stakes; to surround. 'Impale him with your weapons round about.' (Shak) 'Impenetrable, impaled with circling fire.' (Milton) ... 3 …

impanation
Embodiment in bread; the supposed real presence and union of Christ's material body and blood with the substance of the elements of the eucharist without a change in their nature; distinguished from transubstantiation, which supposes a miraculous change of the substance of the elements. It is akin to consubstantiation. ... Origin: Cf. F. Impanation. …

imparipinnate
Having an uneven number of pinnae, by virtue of having one terminal pinna. ... Compare: paripinnate. ... (09 Oct 1997) ...

imparlance
1. Mutual discourse; conference. ... 2. Time given to a party to talk or converse with his opponent, originally with the object of effecting, if possible, an amicable adjustment of the suit. The actual object, however, has long been merely to obtain further time to plead, answer to the allegations of the opposite party. Hence, the delay or continuan …

impatent
Not patent; closed. ... (05 Mar 2000) ...

impatiens
<botany> A genus of plants, several species of which have very beautiful flowers; so called because the elastic capsules burst when touched, and scatter the seeds with considerable force. Called also touch-me-not, jewelweed, and snapweed. I. Balsamina (sometimes called lady's slipper) is the common garden balsam. ... Origin: L, impatient. ... S …

impearl
1. To form into pearls, or into that which resembles pearls. 'Dewdrops which the sun Impearls on every leaf and every flower.' (Milton) ... 2. To decorate as with pearls or with anything resembling pearls. 'With morning dews impearled.' (Mrs. Browning) 'The dews of the morning impearl every thorn.' (R. Digby) ... Origin: Pref. Im- in + pearl: cf. F. …

impeccable
Not liable to sin; exempt from the possibility of doing wrong. ... One who is impeccable; especially, one of a sect of Gnostic heretics who asserted their sinlessness. 'God is infallible, impeccable, and absolutely perfect.' (P. Skelton) ... Origin: L. Impeccabilis; pref. Im- not + peccare to err, to sin: cf. F. Impeccable. ... Source: Websters Dictio …

impedance
1. Total opposition to flow. When flow is steady, impedance is simply the resistance, e.g., the driving pressure per unit flow; when flow is changing, impedance also includes the factors that oppose changes in flow. Thus, deviations of impedance, from simple ohmic resistance because of the effects of capacitance and inductance, become more importan …

impedance angle
A term expressing the ratio of electric resistance to electric capacitance (ohms to microfarads) in the tissues of the body or any other substance. ... (05 Mar 2000) ...

impedance method
A method for localizing brain structures by measuring impedance of electric current. ... (05 Mar 2000) ...

impenetrable
1. Incapable of being penetrated or pierced; not admitting the passage of other bodies; not to be entered; impervious; as, an impenetrable shield. 'Highest woods impenetrable To star or sunlight.' (Milton) ... 2. <physics> Having the property of preventing any other substance from occupying the same space at the same time. ... 3. Inaccessible, …

imperative conception
A concept that does not arise from association but appears spontaneously and refuses to be banished. ... (05 Mar 2000) ...

imperator
A commander; a leader; an emperor; originally an appellation of honor by which Roman soldiers saluted their general after an important victory. Subsequently the title was conferred as a recognition of great military achievements by the senate, whence it carried wiht it some special privileges. After the downfall of the Republic it was assumed by Au …

imperception
Inability to form a mental image of an object by combining the sensory data obtained therefrom. ... Origin: L. In-, not, + per-cipio, pp. -ceptus, to perceive ... (05 Mar 2000) ...

imperfect flower
A flower containing stamen and pistil organs required for pollination but lacking sepals or petals or both of these organs. ... (09 Oct 1997) ...

imperfect fungus
A fungus in which the means of sexual reproduction is not yet recognised; these fungi generally reproduce by means of conidia. ... Perfect fungus, a fungus possessing both sexual and asexual means of reproduction, and in which both mating forms are recognised. ... Ray fungus, a bacterium which is a member of the order Actinomycetales. ... (05 Mar 2000 …

imperfect stage
A mycological term used to describe the asexual life cycle phase of a fungus. ... See: anamorph. ... (05 Mar 2000) ...

imperfect state
In fungi, the state or stage at which only asexual spores such as conidia are formed; most such species are classified as Deuteromycetes (Fungi Imperfecti). ... (05 Mar 2000) ...

imperforate
Synonym for atretic ... <embryology> Having an abnormal closure or absence of a body opening or tubular organ (for example, a child born without an oesophagus would have an atretic birthdefect). ... (09 Oct 1997) ...

imperforate anus
<embryology, paediatrics> A congenital obstruction of the anal opening. Occurs in approximately 1 in 5,000 infants. This condition is corrected through surgery. ... (27 Sep 1997) ...

imperforate hymen
A hymen in which there is no opening, the membrane completely occluding the vagina. ... (05 Mar 2000) ...

imperforation
Condition of being atretic, occluded, or closed; indicated in compound words by the prefix atreto-or the suffix -atresia. ... Origin: L. Im-neg. + per-foro, pp. -atus, to bore through ... (05 Mar 2000) ...

impermeable
Not permeable; not permitting the passage of substances (e.g., liquids, gases) or heat through a membrane or other structure. ... Synonym: impervious. ... Origin: L. Im-permeabilis, not to be passed through ... (05 Mar 2000) ...

impermeable cell junctions
Synonym for zonula occludens ... <cell biology> Specialised intercellular junction in which the two plasma membranes are separated by only 1-2nm. Found near the apical surface of cells in simple epithelia, forms a sealing gasket around the cell. Prevents fluid moving through the intercellular gap and the lateral diffusion of intrinsic membrane …

impermeant
Unable to pass through a particular semipermeable membrane. ... Origin: L. Im-, neg., + permano, to penetrate ... (05 Mar 2000) ...

impersistence
A transitory existence or occurrence, lasting only a short time. ... Origin: L. Im-, neg. + persisto, to persist ... Motor impersistence, inability to sustain a movement. ... (05 Mar 2000) ...

impervious
Synonym for impermeable ... Not permeable; not permitting the passage of substances (e.g., liquids, gases) or heat through a membrane or other structure. ... Synonym: impervious. ... Origin: L. Im-permeabilis, not to be passed through ... (05 Mar 2000) ...

impetiginization
The occurrence of impetigo in an area of preexisting dermatosis. ... (05 Mar 2000) ...

impetiginous
Relating to impetigo. ... (05 Mar 2000) ...

impetiginous cheilitis
Pyoderma of the lips. ... (05 Mar 2000) ...

impetiginous syphilid
Synonym for pustular syphilid ... A type of pustular eruption occurring in secondary syphilis. ... Synonym: acne syphilitica, acneform syphilid, ecthymatous syphilid, impetiginous syphilid, varioliform syphilid. ... (05 Mar 2000) ...

impetigo
<dermatology, microbiology> A contagious pyoderma caused by direct inoculation of group A streptococci or Staphylococcus aureus into superficial cutaneous abrasions or compromised skin. ... It is most commonly seen in children, usually located on the face, especially about the nose and mouth. ... The characteristic features are the presence of …

impetigo bullosa
Impetigo with lesions of large size, forming bullae. ... (05 Mar 2000) ...

impetigo circinata
A ringlike configuration of bullous lesions of impetigo formed by confluence of several bullae or by the rupture of a single lesion with crusting of the periphery. ... (05 Mar 2000) ...

impetigo contagiosa
Synonym for impetigo ... <dermatology, microbiology> A contagious pyoderma caused by direct inoculation of group A streptococci or Staphylococcus aureus into superficial cutaneous abrasions or compromised skin. ... It is most commonly seen in children, usually located on the face, especially about the nose and mouth. ... The characteristic featu …

impetigo contagiosa bullosa
Discrete purulent skin lesions occasionally seen with streptococcal pyoderma. ... (05 Mar 2000) ...

impetigo eczematodes
Synonym for eczema pustulosum ... A later stage of vesicular eczema, in which the vesicles have become secondarily infected; the lesions become covered with purulent crusts. ... Synonym: impetigo eczematodes. ... (05 Mar 2000) ...

impetigo herpetiformis
A rare pyoderma, occurring most commonly in pregnant women in the third trimester, as an eruption of small closely aggregated pustules developing upon an inflammatory base and accompanied by severe constitutional symptoms and foetal death. ... (05 Mar 2000) ...

impetigo neonatorum
Synonym for dermatitis exfoliativa infantum ... Dermatitis exfoliativa neonatorum, a generalised pyoderma accompanied by exfoliative dermatitis, with constitutional symptoms, affecting young infants, which may result from atopic dermatitis, Leiner's disease or staphylococcal scalded skin syndrome. ... Synonym: impetigo neonatorum. ... (05 Mar 2000) …

impetigo vulgaris
Synonym for impetigo ... <dermatology, microbiology> A contagious pyoderma caused by direct inoculation of group A streptococci or Staphylococcus aureus into superficial cutaneous abrasions or compromised skin. ... It is most commonly seen in children, usually located on the face, especially about the nose and mouth. ... The characteristic featu …

impetus
1. A property possessed by a moving body in virtue of its weight and its motion; the force with which any body is driven or impelled; momentum. ... Momentum is the technical term, impetus its popular equivalent, yet differing from it as applied commonly to bodies moving or moved suddenly or violently, and indicating the origin and intensity of the m …

impeyan pheasant
<zoology> An Indian crested pheasant of the genus Lophophorus. Several species are known. Called also monaul, monal. ... They are remarkable for the bright colour and brilliant matallic hues of their plumage. The best known species (L. Impeyanus) has the neck of a brilliant metallic red, changing to golden yellow in certain lights. ... Origin: …

implant
<dentistry> A replacement for one of your missing teeth. The implant is different than a bridge in that the implant is permanently attached into your jaw. ... (08 Jan 1998) ...

implant denture
A denture that receives its stability and retention from a substructure which is partially or wholly implanted under the soft tissues of the denture basal seat. ... See: implant denture substructure, implant denture superstructure, subperiosteal implant. ... (05 Mar 2000) ...

implant denture substructure
The metal framework which is placed beneath the soft tissues in contact with, or embedded into, bone for the purpose of supporting an implant denture superstructure. ... (05 Mar 2000) ...

implantation
<procedure> The insertion or grafting into the body of biological, living, inert or radioactive material. ... Origin: L. Plantare = to set ... (18 Nov 1997) ...

implantation cone
Synonym for axon hillock ... <cell biology> Tapering region between a neuron's cell body and its axon. This region is responsible for summating the graded inputs from the dendrites and producing action potentials if the threshold is exceeded. ... (12 Mar 1998) ...

implantation cyst
Synonym for epidermal cyst ... Intradermal or subcutaneous saclike structure, the wall of which is stratified epithelium containing keratohyalin granules. ... (12 Dec 1998) ...

implantation graft
Placing of Davis graft's deep into the interstices of granulation tissue. ... (05 Mar 2000) ...

implanted suture
Passage of a pin through each lip of the wound parallel to the line of incision, the pins then being looped together with suture's. ... (05 Mar 2000) ...

implants, experimental
Artificial substitutes for body parts and materials inserted into organisms during experimental studies. ... (12 Dec 1998) ...

implication
A possible later effect of an action. ... (18 Nov 1997) ...

implicit
1. Infolded; entangled; complicated; involved. 'In his woolly fleece I cling implicit.' (Pope) ... 2. Tacitly comprised; fairly to be understood, though not expressed in words; implied; as, an implicit contract or agreement. ... 3. Resting on another; trusting in the word or authority of another, without doubt or reserve; unquestioning; complete; as, …

implosion
1. A sudden collapse, as of an evacuated vessel, in which there is a bursting inward rather than outward as in explosion. ... 2. A type of behaviour therapy, similar to flooding, during which the patient is given massive exposure to extreme anxiety-arousing stimuli by being asked to describe, and thus relive in his imagination, those life events or …

implosive therapy
A method for extinguishing anxiety by a saturation exposure to the feared stimulus situation or its substitute. ... (12 Dec 1998) ...

impose
1. To lay on; to set or place; to put; to deposit. 'Cakes of salt and barley [she] did impose Within a wicker basket.' (Chapman) ... 2. To lay as a charge, burden, tax, duty, obligation, command, penalty, etc.; to enjoin; to levy; to inflict; as, to impose a toll or tribute. 'What fates impose, that men must needs abide.' (Shak) 'Death is the penalt …

imposition
1. The act of imposing, laying on, affixing, enjoining, inflicting, obtruding, and the like. 'From imposition of strict laws.' . 'Made more solemn by the imposition of hands.' (Hammond) ... 2. That which is imposed, levied, or enjoined; charge; burden; injunction; tax. ... 3. <engineering> An extra exercise enjoined on students as a punishment. …

impossibility
Origin: L. Impossibilitas: cf. F. Impossibilite. ... 1. The quality of being impossible; impracticability. 'They confound difficulty with impossibility.' (South) ... 2. An impossible thing; that which can not be thought, done, or endured. 'Impossibilities! O, no, there's none.' (Cowley) ... 3. Inability; helplessness. Logical impossibility, a conditio …

impossible
An impossibility. ''Madam,' quoth he, 'this were an impossible!'' (Chaucer) ... Not possible; incapable of being done, of existing, etc.; unattainable in the nature of things, or by means at command; insuperably difficult under the circumstances; absurd or impracticable; not feasible. 'With men this is impossible; but with God all things are possibl …

impotence
<urology> The inability to achieve or sustain a penile erection. ... (27 Sep 1997) ...

impotence, vasculogenic
Impotence caused by a diminution of blood flow to the penis. Arteries involved can be the terminal aorta, hypogastric, pudendal, penile, and cavernous arteries. Ectopic drainage of the corpora cavernosa via large superficial dorsal veins or abnormally large cavernous and crural veins can cause venogenic impotence. The expression 'venous leakage' is …

impotent
1. Not potent; wanting power, strength. Or vigor. Whether physical, intellectual, or moral; deficient in capacity; destitute of force; weak; feeble; infirm. 'There sat a certain man at Lystra, impotent inhis feet.' (Acts xiv. 8) 'O most lame and impotent conclusion!' (Shak) 'Not slow to hear, Nor impotent to save.' (Addison) ... 2. Wanting the power …

impotentia
Impotence, inability. ... (18 Nov 1997) ...

impoverish
1. To make poor; to reduce to poverty or indigence; as, misfortune and disease impoverish families. ... 2. To exhaust the strength, richness, or fertility of; to make sterile; as, to impoverish land. ... Origin: OF. Empovrir; pref. Em- (L. In) + povre poor, F. Pauvre; cf. OF. Apovrir, F. Appauvrir, where the prefix is a-, L. Ad. Cf. Empoverish, and s …

impracticable
1. Not practicable; incapable of being performed, or accomplished by the means employed, or at command; impossible; as, an impracticable undertaking. ... 2. Not to be overcome, presuaded, or controlled by any reasonable method; unmanageable; intractable; not capable of being easily dealt with; used in a general sense, as applied to a person or thing …

imprecate
1. To call down by prayer, as something hurtful or calamitous. 'Imprecate the vengeance of Heaven on the guilty empire.' (Mickle) ... 2. To invoke evil upon; to curse; to swear at. 'In vain we blast the ministers of Fate, And the forlorn physicians imprecate.' (Rochester) ... Origin: L. Imprecatus, p. P. Of imprecari to imprecate; pref. Im- in, on + …

impregnate
Impregnated; made prolific. 'The scorching ray Here pierceth not, impregnate with disease.' (Byron) ... Origin: LL. Impraegnatus, p. P. ... 1. To make pregnant; to cause to conceive; to render prolific; to get with child or young. ... 2. <biology> To come into contact with (an ovum or egg) so as to cause impregnation; to fertilize; to fecundate. …

impregnation
1. <gynaecology> The act of fecundation or of rendering pregnant. ... 2. The process or act of saturation, a saturated condition. ... Origin: L. Impregnatio ... (18 Nov 1997) ...

imprescriptible
1. Not capable of being lost or impaired by neglect, by disuse, or by the claims of another founded on prescription. 'The right of navigation, fishing, and others that may be exercised on the sea, belonging to the right of mere ability, are imprescriptible.' (Vattel (Trans)) ... 2. Not derived from, or dependent on, external authority; self-evidenci …

impress
1. To press, stamp, or print something in or upon; to mark by pressure, or as by pressure; to imprint (that which bears the impression). 'His heart, like an agate, with your print impressed.' (Shak) ... 2. To produce by pressure, as a mark, stamp, image, etc.; to imprint (a mark or figure upon something). ... 3. To fix deeply in the mind; to present …

impressio
Synonym: impression. ... Origin: L. ... (05 Mar 2000) ...

impressio cardiaca hepatis
Synonym for cardiac impression of liver ... A depression on the superior area of the diaphragmatic surface of the liver corresponding to the position of the heart. ... Synonym: impressio cardiaca hepatis. ... (05 Mar 2000) ...

impressio cardiaca pulmonis
Synonym for cardiac impression of lung ... The depression on the medial surface of each lung produced by the presence of the heart. It is more pronounced on the left lung. ... Synonym: impressio cardiaca pulmonis. ... (05 Mar 2000) ...

impressio colica
Synonym for colic impression ... <anatomy> A hollow on the visceral surface of the right lobe of the liver anteriorly, corresponding to the situation of the right flexure and beginning of the transverse colon. ... Synonym: impressio colica. ... (05 Mar 2000) ...

impressio duodenalis
Synonym for duodenal impression ... A hollow on the visceral surface of the right lobe of the liver alongside the gallbladder, marking the situation of the duodenum. ... Synonym: impressio duodenalis. ... (05 Mar 2000) ...

impressio gastrica
Synonym for gastric impression ... A hollow on the visceral surface of the left lobe of the liver corresponding to the location of the stomach. ... Synonym: impressio gastrica. ... (05 Mar 2000) ...

impressio oesophagea
Synonym for oesophageal impression ... The marking of the oesophagus on the back of the left lobe of the liver. ... Synonym: impressio oesophagea. ... (05 Mar 2000) ...

impressio petrosa pallii
Synonym for petrosal impression of the pallium ... A shallow impression on the inferior surface of the cerebral hemisphere made by the superior margin of the petrous part of the temporal bone. ... Synonym: impressio petrosa pallii. ... (05 Mar 2000) ...

impressio renalis
Synonym for renal impression ... A hollow on the visceral surface of the right lobe of the liver, in which lies the right kidney. ... Synonym: impressio renalis. ... (05 Mar 2000) ...

impressio suprarenalis
Synonym for suprarenal impression ... A hollow on the visceral surface of the right lobe of the liver, adjoining the groove for inferior venae cava, in which lies the right suprarenal gland. ... Synonym: impressio suprarenalis. ... (05 Mar 2000) ...

impressio trigeminalis
Synonym for trigeminal impression ... A depression on the anterior surface of the petrous portion of the temporal bone, near the apex, lodging the trigeminal ganglion. ... Synonym: impressio trigeminalis. ... (05 Mar 2000) ...

impression
1. The act of impressing, or the state of being impressed; the communication of a stamp, mold, style, or character, by external force or by influence. ... 2. <dentistry> The first step in making a model of your teeth. You bite into a container filled with algenate, and the algenate hardens to produce a mold of your teeth. ... 3. That which is i …

impression area
In dentistry, that surface which is recorded in an impression. ... (05 Mar 2000) ...

impression compound
Synonym for modeling plastic ... A thermoplastic material usually composed of gum damar and prepared chalk, used especially for making dental impressions. ... Synonym: impression compound, modeling composition, modeling compound. ... (05 Mar 2000) ...

impression material
Any substance or combination of substances used for making a negative reproduction or impression. ... (05 Mar 2000) ...

impressiones digitatae
Synonym for impressions for cerebral gyri ... The depressions on the inner surface of the skull which correspond to the convolutions of the brain. ... Synonym: impressiones digitatae, digitate impressions. ... (05 Mar 2000) ...

impressions
<dentistry> The first step in making a model of your teeth. You bite into a container filled with algenate, and the algenate hardens to produce a mold of your teeth. ... (05 Mar 2000) ...

impressions for cerebral gyri
The depressions on the inner surface of the skull which correspond to the convolutions of the brain. ... Synonym: impressiones digitatae, digitate impressions. ... (05 Mar 2000) ...

impressions of oesophagus
Synonym for oesophageal constrictions ... Three narrowings of the oesophagus normally demonstrated radiographically following a barium swallow: the upper or pharyngeal oesophageal constriction, at the beginning of the oesophagus, is caused by the cricopharyngeus muscle, often referred to as the superior oesophageal sphincter; the middle or aortic co …

impressive aphasia
Synonym for sensory aphasia ... Aphasia in which there is impairment in the comprehension of spoken and written words, associated with effortless, articulated, but paraphrasic, speech and writing; malformed words, substitute words, and enologisms are charcteristic. When severe, and speech is incomprehensible, it is called jargon aphasia. The patient …

imprint
1. To impress; to mark by pressure; to indent; to stamp. 'And sees his num'rous herds imprint her sands.' (Prior) ... 2. To stamp or mark, as letters on paper, by means of type, plates, stamps, or the like; to print the mark (figures, letters, etc, upon something). 'Nature imprints upon whate'er we see, That has a heart and life in it, 'Be free.'' ( …

imprinting
1. <genetics> A remarkable genetic phenomenon. The gist is that gene expression depends on the sex of the transmitting parent. There is, for example, increased severity of neurofibromatosis when the gene for it came from the mother. ... 2. <psychology> A particular kind of learning characterised by occurrence in very early life, rapidity …

impromidine
<chemical> N-(3-(1h-imidazol-4-yl)propyl)-n'-(2-(((5-methyl-1h-imidazol-4-yl)methyl)thio)ethyl)guanidine. A highly potent and specific histamine h2 receptor agonist. It has been used diagnostically as a gastric secretion indicator. ... Pharmacological action: histamine agonist. ... Chemical name: Guanidine, N-(3-(1H-imidazol-4-yl)propyl)-N'-(2- …

improper
1. Not proper; not suitable; not fitted to the circumstances, design, or end; unfit; not becoming; incongruous; inappropriate; indecent; as, an improper medicine; improper thought, behavior, language, dress. 'Follow'd his enemy king, and did him service, Improper for a slave.' (Shak) 'And to their proper operation still, Ascribe all Good; to their …

impulse
1. The act of impelling, or driving onward with sudden force; impulsion; especially, force so communicated as to produced motion suddenly, or immediately. 'All spontaneous animal motion is performed by mechanical impulse.' (S. Clarke) ... 2. The effect of an impelling force; motion produced by a sudden or momentary force. ... 3. <mechanics> The …

impulse control disorder
A class of mental disorder's characterised by an individual's failure to resist an impulse to perform some act harmful to himself or to others; includes pathological gambling, pedophilia, kleptomania, pyromania, trichotillomania, intermittent and isolated explosive disorder's. ... (05 Mar 2000) ...

impulse control disorders
Disorders whose essential features are the failure to resist an impulse, drive, or temptation to perform an act that is harmful to the individual or to others. Individuals experience an increased sense of tension prior to the act and pleasure, gratification or release of tension at the time of committing the act. ... (12 Dec 1998) ...

impulsion
An abnormal urge to perform a certain activity. ... (05 Mar 2000) ...

impulsive
1. Having the power of driving or impelling; giving an impulse; moving; impellent. 'Poor men! poor papers! We and they Do some impulsive force obey.' (Prior) ... 2. Actuated by impulse or by transient feelings. 'My heart, impulsive and wayward.' (Longfellow) ... 3. <mechanics> Acting momentarily, or by impulse; not continuous; said of forces.