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


ovarium gyratum
An ovary showing curved or irregular grooves or furrows. ... (05 Mar 2000) ...

ovarium lobatum
An ovary demarcated by deep furrows into two or more lobes. ... (05 Mar 2000) ...

ovarium masculinum
Synonym for testicular appendage ... A vesicular nonpedunculated structure attached to the cephalic pole of the testis; a vestige of the cephalic end of the paramesonephric (mullerian) duct. ... Synonym: appendix testis, appendix of the testis, nonpedunculated hydatid, ovarium masculinum, sessile hydatid. ... (05 Mar 2000) ...

ovary
<anatomy> One of two small oval bodies situated on either side of the uterus on the posterior surface of the broad ligament. The structures in which the ova (eggs) are developed and released during ovulation. ... (05 Jan 1998) ...

ovary, dermoid cyst of the
Tumour that develops from a totipotential germ cell (a primary oocyte) retained within the egg sac (ovary). Being totipotential, that cell can give rise to all orders of cells necessary to form mature tissues and often recognizable structures such as hair, bone and sebaceous (oily) material, neural tissue and teeth. Dermoid cysts may occur at any a …

ovate
Shaped like an egg in two dimensions, and attached by the wider end. ... Compare: ovoid. ... (09 Oct 1997) ...

ovation
1. A lesser kind of triumph allowed to a commander for an easy, bloodless victory, or a victory over slaves. ... 2. Hence: An expression of popular homage; the tribute of the multitude to a public favorite. 'To rain an April of ovation round Their statues.' (Tennyson) ... Origin: L. Ovatio, fr. Ovare to exult, rejoice, triumph in an ovation; cf. Gr. …

oven dry ton
An amount of wood that weighs 2,000 pounds at zero percent moisture content. ... (05 Dec 1998) ...

ovenbird
<ornithology> Any species of the genus Furnarius, allied to the creepers. They inhabit South America and the West Indies, and construct curious oven-shaped nests. ... In the United States, Seiurus aurocapillus; called also golden-crowned thrush. ... In England, sometimes applied to the willow warbler, and to the long-tailed titmouse. ... (06 Mar …

overall
A single citation covering several articles of various degrees of specificity or a single citation covering papers presented at a meeting. A subject overall refers to a series of articles on a single subject; a congress overall refers to papers presented at a formal local, regional, national, or international gathering; a society overall refers to …

overall response rate
<pharmacology> Sum of complete and partial tumour responses seen in a study, divided by the number of evaluable patients. ... (05 Jan 1998) ...

overanxious disorder
A mental disorder of childhood or adolescence marked by excessive worrying and fearful behaviour not related specifically to separation or due to recent stress. ... (05 Mar 2000) ...

overbank flooding
<ecology> Any situation in which inundation occurs as a result of the water level of a river or stream rising above bank level. ... (05 Jan 1998) ...

overbite
<dentistry> Vertical overlapping of the upper teeth over the lower. ... (08 Jan 1998) ...

overclosure
A decrease in occlusal vertical dimension. ... (05 Mar 2000) ...

overcome
1. To get the better of; to surmount; to conquer; to subdue; as, to overcome enemies in battle. 'This wretched woman overcome Of anguish, rather than of crime, hath been.' (Spenser) ... 2. To overflow; to surcharge. ... 3. To come or pass over; to spreads over. 'And overcome us like a summer's cloud.' (Shak) ... Synonym: To conquer, subdue, vanquish, …

overcompensation
1. An exaggeration of personal capacity by which one overcomes a real or imagined inferiority. ... 2. The process in which a psychologic deficiency inspires exaggerated correction. ... See: compensation. ... (05 Mar 2000) ...

overcorrection
1. <psychology> In behaviour modification treatment programs, especially those involving mentally retarded individuals, overlearning the desired target behaviour beyond the set criterion to assure that the behaviour will continue to meet the established criterion when the post-learning decrements and forgetting occur. ... 2. <microscopy> …

overdenture
Synonym for overlay denture ... A complete denture that is supported by both soft tissue and natural teeth that have been altered so as to permit the denture to fit over them. The altered teeth may have been fitted with short or long copings, locking devices, or connecting bars. ... Synonym: bar joint denture, hybrid prosthesis, overdenture, telescop …

overdetermination
In psychoanalysis, ascribing the cause of a single behavioural or emotional reaction, mental symptom, or dream to the operation of two or more forces, that is, it is overdetermined (e.g., ascribing the nature of an emotional outburst not only to the immediate precipitant but also to a lingering inferiority complex). ... (05 Mar 2000) ...

overdispersion
<epidemiology> See aggregation ... (05 Dec 1998) ...

overdominance
That state in which the heterozygote has greater phenotype value and perhaps is more fit than the homozygous state for either of the alleles that it comprises. ... Compare: balanced polymorphism. ... (05 Mar 2000) ...

overdominant
Denoting heterozygous states that exhibit overdominance. ... (05 Mar 2000) ...

overdosage
1. <pharmacology> The administration of an excessive dose. ... 2. The condition resulting from an excessive dose. ... (18 Nov 1997) ...

overdose
1. To administer an excessive dose. ... 2. An excessive dose. ... (18 Nov 1997) ...

overdrive
An electrophysiologic pacing technique to exceed the rate of an abnormal pacemaker and so capture the territory controlled by that pacemaker (usually atrial). ... (05 Mar 2000) ...

overeruption
Occlusal projection of a tooth beyond the line of occlusion. ... (05 Mar 2000) ...

overextension
Synonym for hyperextension ... Extension of a limb or part beyond the normal limit. ... Synonym: overextension, superextension. ... (05 Mar 2000) ...

overflow incontinence
Involuntary loss of urine associated with overdistention of the bladder, with or without a detrusor contraction. ... Synonym: paradoxical incontinence. ... (05 Mar 2000) ...

overflow wave
The descending wave of the sphygmogram from the apex to the first anacrotic break. ... (05 Mar 2000) ...

overgrafting
Placing a second or additional grafts over a previously healed graft from which the epithelium has been removed, as with dermabrasion, to strengthen a split-thickness graft. ... (05 Mar 2000) ...

overgrowth
Just what it sounds like: excessive growth. ... (12 Dec 1998) ...

overgrowth syndromes
Conditions with multiple abnormalities including excessive growth. Early overgrowth syndromes that affecting children include the fragile x and beckwith-wiedemannn syndromes. Overactivity of the pituitary gland with overproductiuon of growth hormone causes overgrowth before adolescence and a distinctive pattern of overgrowth called acromegaly. ... ( …

overhang
An excess of dental filling material beyond the cavity margin or normal tooth contour. ... (05 Mar 2000) ...

overhanging restoration
A restoration with excessive material at the junction of the restoration margin and the tooth. ... (05 Mar 2000) ...

overhead cover
Material (organic or inorganic) that provides protection to fish or other aquatic animals from above, generally includes material overhanging the stream less than a particular distance above the water surface. Values less than 0.5 m (1.5 feet) and less than 1 m (3 feet) have been used. ... (09 Oct 1997) ...

overhead projector
Synonym for epidiascope ... <instrument> A projector by which images are reflected by a mirror through a lens, or lenses, onto a screen, using reflected light for opaque objects and transmitted light for translucent or transparent ones. ... Synonym: overhead projector. ... Origin: epi-+ G. Dia, through, + skopeo, to view ... (05 Mar 2000) ...

overhydration
Synonym for hyperhydration ... Excess water content of the body; may result from the intravenous administration of unduly large amounts of glucose solution. ... Synonym: overhydration. ... (05 Mar 2000) ...

overjet
<dentistry> Horizontal projection of upper teeth beyond the lower. ... (08 Jan 1998) ...

overlap hybridization
Synonym for chromosome walking ... A procedure to find and sequence a gene whose approximate position in a chromosome is known by classical genetic linkage studies. Starting with the known sequence of a gene shown by classical genetics to be near to the novel gene, new clones are picked from a genomic library by hybridisation with a short probe gene …

overlap index
<cell biology> A measure of the extent to which a population of cells in culture forms multilayers. The predicted amount of overlapping is calculated knowing the cell density, the projected area of the nucleus (usually) and assuming a Poisson distribution. The actual overlap is measured on fixed and stained preparations and the ratio of actua …

overlapping
<cell biology> In cell locomotion situation in which the leading lamella of one cell moves actively over the dorsal surface of another cell should be distinguished from underlapping. ... (18 Nov 1997) ...

overlapping gene
<molecular biology> Different genes whose nucleotide coding sequences overlap to some extent. The common nucleotide sequence is read in two or three different reading frames thus specifying different polypeptides. ... (18 Nov 1997) ...

overlapping reading frame
<molecular biology> Start codons in different reading frames which generate different polypeptides from the same DNA sequence. ... (09 Oct 1997) ...

overlay
1. To lay, or spread, something over or across; hence, to cover; to overwhelm; to press excessively upon. 'When any country is overlaid by the multitude which live upon it.' (Sir W. Raleigh) 'As when a cloud his beams doth overlay.' (Spenser) 'Framed of cedar overlaid with gold.' (Milton) 'And overlay With this portentous bridge the dark abyss.' (M …

overlay denture
A complete denture that is supported by both soft tissue and natural teeth that have been altered so as to permit the denture to fit over them. The altered teeth may have been fitted with short or long copings, locking devices, or connecting bars. ... Synonym: bar joint denture, hybrid prosthesis, overdenture, telescopic denture. ... (05 Mar 2000) …

overlearning
Learning in which practice proceeds beyond the point where the act can just be performed with the required degree of excellence. ... (12 Dec 1998) ...

overnight capital cost
The capital cost of a project if it could be constructed overnight. This cost does not include the interest cost of funds used during construction. ... (05 Dec 1998) ...

overproduction theory
Synonym for Weigert's law ... The loss or destruction of a part or element in the organic world is likely to result in compensatory replacement and overproduction of tissue during the process of regeneration or repair (or both), as in the formation of callus when a fractured bone heals. ... Synonym: overproduction theory. ... (05 Mar 2000) ...

overresponse
An abnormally strong reaction to a stimulus. ... (05 Mar 2000) ...

overriding
1. Slippage of the lower fragment of a broken long bone upward and alongside the proximal portion. ... 2. Obsolete term denoting a foetal head which is palpable above the symphysis because of cephalopelvic disproportion. ... (05 Mar 2000) ...

overriding aorta
A congenitally malpositioned aorta whose origin straddles the ventricular septum and so receives ejected blood from the right ventricle as well as from the left; it is found especially in tetralogy of Fallot. ... (05 Mar 2000) ...

overripe cataract
Synonym for hypermature cataract ... A cataract in which the lens cortex becomes liquid, with the nucleus gravitating within the capsule (Morgagni's cataract). ... Synonym: overripe cataract. ... (05 Mar 2000) ...

oversensing
Sensing of electrical or magnetic signals, which normally should not be sensed by a pacemaker, but result in inappropriate inhibition of the pacemaker's output. ... (05 Mar 2000) ...

overshoot
1. Generally, any initial change, in response to a sudden step change in some factor, that is greater than the steady-state response to the new level of that factor; common in systems in which inertia or a time lag in negative feedback outweighs any damping that may be present. Changes in a negative direction are sometimes distinguished by the term …

overstory
Overstory is the larger, taller trees of growth which occupies a forest area and shades young trees, hardwoods, brush, and other deciduous varieties which are growing beneath the larger trees (i.e., understory). ... (09 Oct 1997) ...

overt homosexuality
Homosexual inclinations consciously experienced and expressed in actual homosexual behaviour. ... (05 Mar 2000) ...

Overton, Charles
<person> German biologist in Sweden, 1865-1933. ... See: Meyer-Overton rule, Meyer-Overton theory of narcosis. ... (05 Mar 2000) ...

overtone
Any of the tones, other than the lowest or fundamental tone, of which a sound is composed. ... (05 Mar 2000) ...

overturning moment
<radiobiology> Torque (moment) on a toroidal field coil in a tokamak, about the device's radial direction, that results from out-of-plane forces on the coil due to the interactions between the coil current and the poloidal (vertical) magnetic field. This torque tends to overturn the vertical toroidal field coil, and must be engineered against …

overvalued idea
Synonym for fixed idea ... An exaggerated notion, belief, or delusion that persists, despite evidence to the contrary, and controls the mind, the obstinate conviction of a psychotic person regarding the correctness of his delusion. ... Synonym: idee fixe, overvalued idea, permanent dominant idea. ... (05 Mar 2000) ...

overventilation
Synonym for hyperventilation ... A state in which there is an increased amount of air entering the pulmonary alveoli (increased alveolar ventilation), resulting in reduction of carbon dioxide tension and eventually leading to alkalosis. ... (18 Nov 1997) ...

overweight
Obesity. Please see MedicineNet site on OBESITY for information. ... (12 Dec 1998) ...

overwintering
Persistence of an infectious agent in its vector for extended periods, such as the cooler winter months, during which the vector has no opportunity to be reinfected or to infect another host. ... (05 Mar 2000) ...

ovi-
Egg. ... See: oo-, ovo-. ... Origin: L. Ovum ... (05 Mar 2000) ...

ovicapsule
1. <anatomy> The outer layer of a Graafian follicle. ... 2. <zoology> Same as Ootheca. ... (06 Mar 1998) ...

ovicidal
Causing death of the ovum. ... Origin: ovi-+ L. Caedo, to kill ... (05 Mar 2000) ...

oviduct
<anatomy> The tubular tract in female animals through which eggs are discharged either to the exterior or, in mammals, to the uterus. ... (18 Nov 1997) ...

oviductal
Relating to a uterine tube. ... Synonym: oviducal. ... (05 Mar 2000) ...

ovigenesis
Synonym for oogenesis ... The process of egg formation. ... (18 Nov 1997) ...

ovigenetic
Synonym for oogenetic ... Producing ova. ... Synonym: oogenic, oogenous, ovigenetic, ovigenic, ovigenous. ... (05 Mar 2000) ...

ovigenous
Synonym for oogenetic ... Producing ova. ... Synonym: oogenic, oogenous, ovigenetic, ovigenic, ovigenous. ... (05 Mar 2000) ...

ovigerus
Synonym for cumulus oophorus ... A mass of epithelial cells surrounding the ovum in the ovarian follicle. ... Synonym: discus proligerus, ovigerus, proligerous disk, proligerous membrane. ... Origin: NA ... (05 Mar 2000) ...

ovine
Relating to, affecting, resembling or derived from a sheep. ... (09 Oct 1997) ...

ovine acetonaemia
Synonym for pregnancy toxaemia of sheep ... A disease of preparturient ewes characterised primarily by impaired nervous function; the primary predisposing cause is undernutrition in late pregnancy. ... Synonym: ovine acetonaemia. ... (05 Mar 2000) ...

ovine mastitis
An acute inflammation of the sheep udder, usually gangrenous. ... Synonym: bluebag. ... (05 Mar 2000) ...

ovine progressive pneumonia
Synonym for maedi ... A chronic, progressive, contagious interstitial pneumonitis of sheep in Europe and the U.S. Caused by a 'slow virus' (family Lentiviridae); it is now believed that maedi and visna are two histopathological and clinical manifestations of the same viral infection. ... Synonym: ovine progressive pneumonia. ... Origin: Icelandic, dys …

ovinia
Synonym: sheep-pox. ... Origin: L. Ovinus, relating to a sheep ... (05 Mar 2000) ...

oviparous
Egg-laying. ... Producing eggs which hatch after leaving the body of the female. ... Germinating while still attached to the parent plant, for example: mangrove. ... (09 Oct 1997) ...

oviposit
To lay eggs; applied especially to insects. ... Origin: ovi-+ L. Pono, pp. Positus, to place ... (05 Mar 2000) ...

oviposition
Act of laying or depositing eggs by insects. ... (05 Mar 2000) ...

ovo-
Egg. ... See: oo-, ovi-. ... Origin: L. Ovum ... (05 Mar 2000) ...

ovo-vegetarian
A vegetarian who consumes eggs but does not consume dairy products nor animal flesh. ... (05 Mar 2000) ...

ovochymase
<enzyme> A chymotrypsin-like protease; released during xenopus egg activation; partial amino acid sequence given in first source ... Registry number: EC 3.4.- ... (26 Jun 1999) ...

ovocyte
Synonym: oocyte. ... Origin: ovo-+ G. Kytos, a hollow (cell) ... (05 Mar 2000) ...

ovoflavin
Riboflavin found in eggs. ... (05 Mar 2000) ...

ovogenesis
Synonym for oogenesis ... The process of egg formation. ... (18 Nov 1997) ...

ovoglobulin
Globulin in the white of egg. ... (05 Mar 2000) ...

ovogonium
An obsolete term for oogonium. ... Origin: ovo-+ G. Gone, generation ... (05 Mar 2000) ...

ovoid
Egg-shaped (in three dimensions). ... Compare: ovate. ... (09 Oct 1997) ...

ovolarviparous
Denoting certain nematodes and other invertebrates in which the eggs are hatched within the female, and the larvae developed or protected within the uterus until the correct time for their emergence. ... Origin: ovo-+ L. Larva, a mask, + pario, to bear ... (05 Mar 2000) ...

ovolo
A round, convex molding. ... In Roman work it is usually a quarter circle in section; in Greek work it is flatter, and is equivalent to the echinus; that is, it has in section the elastic curve of the shell of the sea urchin. In mediaeval architecture it is not distinguishable from the multitude of convex moldings, of all sections, which are used.
ovomucin
<chemical> A heterogeneous mixture of glycoproteins responsible for the gel structure of egg white. It has trypsin-inhibiting activity. ... Pharmacological action: trypsin inhibitors. ... Chemical name: Ovomucoid II O ... (12 Dec 1998) ...

ovoplasm
Protoplasm of an unfertilised egg. ... (05 Mar 2000) ...

ovoprotogen
Synonym for lipoic acid ... <biochemistry> 1,2 dithiolane 3 valeric acid. Regarded as a coenzyme in the oxoglutarate dehydrogenase complex of the citric acid cycle. Involved generally in oxidative decarboxylations of _ keto acids. A growth factor for some organisms. ... (18 Nov 1997) ...

ovosiston
An oral contraceptive that consists of a mixture of a progestin and an oestrogen. ... (05 Mar 2000) ...

ovotestis
Gonad in which both testicular and ovarian components are present; a form of hermaphroditism. ... (05 Mar 2000) ...

ovotransferrin
Synonym for conalbumin ... <protein> Nonhaem iron binding protein found in chicken plasma and egg white. ... (18 Nov 1997) ...

ovovitellin
Synonym: vitellin. ... Origin: ovo-+ L. Vitellus, yolk ... (05 Mar 2000) ...

ovular membrane
Synonym for membrana vitellina ... The membrane enveloping the yolk; specifically, the thickened cell membrane of large-yolked ova. ... Synonym: ovular membrane, vitelline membrane. ... Sometimes used to designate the zona pellucida of a mammalian ovum. ... Synonym: yolk membrane. ... (05 Mar 2000) ...