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


embryology
<study> The study of the embryo and its development from a one-celled zygote (fertilized ovum) to the establishment of form and shape (at which point, if it is an animal, it becomes a foetus). A subfield of developmental biology. ... (09 Oct 1997) ...

embryoma
Synonym for embryonal tumour ... Embryonic tumour, a neoplasm, usually malignant, which arises during intrauterine or early postnatal development from an organ rudiment or immature tissue; it forms immature structures characteristic of the part from which it arises, and may form other tissues as well. The term includes neuroblastoma and Wilms' tumou …

embryoma of the kidney
Synonym for Wilm's tumour ... <oncology, tumour> Wilm's tumour or nephroblastoma, is a cancerous tumour of the kidney in children. ... Wilm's is the most common tumour of the kidney and the most common intra-abdominal tumour in children. The exact cause is unknown, but probably develops in foetal tissue due to an underlying genetic factor. Like …

embryomorphous
1. Relating to the formation and structure of the embryo. ... 2. Applied to structures or tissues in the body similar to those in the embryo, or embryonal rests. ... Origin: embryo-+ G. Morphe, shape ... (05 Mar 2000) ...

embryonal adenoma
<tumour> A benign neoplasm in which the glandular epithelial elements are not fully differentiated, resembling immature tissue observed in embryonic development. ... (05 Mar 2000) ...

embryonal area
Embryonic area, the area of the blastoderm on either side of, and immediately cephalic to, the primitive streak where the component cell layers have become thickened. ... (05 Mar 2000) ...

embryonal carcinoma
<tumour> A malignant neoplasm of the testis, composed of large anaplastic cells with indistinct cellular borders, amphophilic cytoplasm, and ovoid, round, or bean-shaped nuclei that may have multiple large nucleoli; in some instances, the neoplastic cells may form tubular structures; embryonal carcinoma's may be malignant teratomas without di …

embryonal carcinosarcoma
Synonym for blastoma ... <tumour> A neoplasm composed chiefly or entirely of immature undifferentiated cells (i.e., blast forms), with little or virtually no stroma. ... Synonym: blastocytoma, embryonal carcinosarcoma. ... Origin: blasto-+ G. -oma, tumour ... (05 Mar 2000) ...

embryonal leukaemia
Synonym for stem cell leukaemia ... A form of leukaemia in which the abnormal cells are thought to be the precursors of lymphoblasts, myeloblasts, or monoblasts. ... Synonym: embryonal leukaemia. ... (05 Mar 2000) ...

embryonal medulloepithelioma
<tumour> An epitheliomatous tumour of the nonpigmented layer of the ciliary epithelium. ... Synonym: embryonal tumour of ciliary body. ... (05 Mar 2000) ...

embryonal tumour
Embryonic tumour, a neoplasm, usually malignant, which arises during intrauterine or early postnatal development from an organ rudiment or immature tissue; it forms immature structures characteristic of the part from which it arises, and may form other tissues as well. The term includes neuroblastoma and Wilms' tumour, and is also used to include c …

embryonal tumour of ciliary body
Synonym for embryonal medulloepithelioma ... <tumour> An epitheliomatous tumour of the nonpigmented layer of the ciliary epithelium. ... Synonym: embryonal tumour of ciliary body. ... (05 Mar 2000) ...

embryonate
Synonym: embryonal. ... 2. Containing an embryo. ... 3. Impregnated. ... (05 Mar 2000) ...

embryonic
Undeveloped, related to the embryo. ... (16 Dec 1997) ...

embryonic blastoderm
That part of the blastoderm that takes part in the formation of the embryonic body. ... (05 Mar 2000) ...

embryonic cataract
A congenital cataract situated near the anterior Y suture of the foetal lens nucleus. ... (05 Mar 2000) ...

embryonic cell
Synonym for blastomere ... One of the cells produced as the result of cell division, cleavage, in the fertilized egg. ... (18 Nov 1997) ...

embryonic circulation
The basic plan of the circulation of a young mammalian embryo, at first similar to that in aquatic forms, with an unpartitioned heart and conspicuous aortic arches in the branchial region; as gestation progresses, the arrangement of the major blood vessels gradually approaches that of an adult, but the routing of blood through the heart, characteri …

embryonic disk
Synonym for germinal disk ... Germ disk, the point in a telolecithal ovum where the embryo begins to be formed. ... Synonym: embryonic disk, germinal area, area germinativa. ... (05 Mar 2000) ...

embryonic haemoglobin
See: haemoglobin Gower-1, haemoglobin Gower-2. ... (05 Mar 2000) ...

embryonic induction
The induction of differentiation in one tissue as a result of proximity to another tissue arising, for example: during gastrulation. One of the best known examples is the induction of the neural tube in the ectoderm by the underlying chordo mesoderm. Although the information to form the tube is present in the competent determined ectoderm, it must …

embryonic membrane
Synonym for foetal membrane ... A structure or tissue that develops from the fertilised ovum but does not form part of the embryo proper. ... Synonym: embryonic membrane, extraembryonic membrane. ... (05 Mar 2000) ...

embryonic shield
A thickened area of the embryonic blastoderm from which the embryo develops. ... (05 Mar 2000) ...

embryonic structures
The anatomical features of the animal embryo deriving from the fertilised ovum, that eventually become the offspring. ... (12 Dec 1998) ...

embryonization
Reversion of a cell or tissue to an embryonic form. ... (05 Mar 2000) ...

embryonoid
Resembling an embryo or a foetus. ... Synonym: embryoid, embryoniform. ... Origin: embryo-+ G. Eidos, appearance ... (05 Mar 2000) ...

embryony
The forming of an embryo. ... (05 Mar 2000) ...

embryopathic cataract
Congenital cataract as a result of intrauterine infection, e.g., rubella. ... (05 Mar 2000) ...

embryopathy
A morbid condition in the embryo or foetus. ... Synonym: fetopathy. ... Origin: embryo-+ G. Pathos, disease ... (05 Mar 2000) ...

embryophore
A membrane or wall around the hexacanth embryo of tapeworms, forming the inner portion of the eggshell. In the genus Taenia, the embryophore is exceptionally thick, with radial striations that form a highly protective structure; in the genus Diphyllobothrium, the embryophore is ciliated and enhances the aquatic life cycle of this and other pseudoph …

embryoscope
<instrument> An instrument for examining the embryos in hens' eggs at different stages of development. ... Origin: embryo-+ G. Skopeo, to examine ... (05 Mar 2000) ...

embryotoxicity
Injury to the embryo, which may result in death or in abnormal development of a part, owing to substances that enter the placental circulation. ... (05 Mar 2000) ...

embryotoxin
This describes any chemical which is harmful to an embryo. ... (09 Oct 1997) ...

embryotoxon
Congenital opacity of the periphery of the cornea, a feature of osteogenesis imperfecta. ... Origin: embryo-+ G. Toxon, bow ... (05 Mar 2000) ...

embryotrophic
Relating to any process or agency involved in the nourishment of the embryo. ... (05 Mar 2000) ...

embryotrophy
The nutrition of the embryo. ... Origin: embryo-+ G. Trophe, nourishment ... (05 Mar 2000) ...

EMC virus
Synonym for encephalomyocarditis virus ... The type species of cardiovirus causing encephalomyelitis and myocarditis in rodents, pigs, and monkeys. Infection in man has been reported with CNS involvement but without myocarditis. ... (12 Dec 1998) ...

emedullate
To extract any marrow. ... Origin: L. E-, from, + medulla, marrow ... (05 Mar 2000) ...

emeiocytosis
Synonym: exocytosis. ... Origin: L. Emitto, to send forth, + G. Kytos, cell, + -osis, condition ... (05 Mar 2000) ...

emendation
<zoology> Any demonstrably intentional change in the original spelling of an available name, other than a mandatory change.). ... (09 Jan 1998) ...

emepronium
<chemical> A muscarinic antagonist used mainly in the treatment of urinary syndromes. It is incompletely absorbed from the gastrointestinal tract and does not cross the blood-brain barrier. ... Pharmacological action: muscarinic antagonists, parasympatholytics. ... Chemical name: Benzenepropanaminium, N-ethyl-N,N,alpha-trimethyl-gamma-phenyl-
emerald
Of a rich green colour, like that of the emerald. 'Emerald meadows.' Emerald fish See Zaratite. ... 1. <chemical> A precious stone of a rich green colour, a variety of beryl. See Beryl. ... 2. A kind of type, in size between minion and nonparel. It is used by English printers. ... This line is printed in the type called emerald. ... Origin: OE. E …

emerge
To rise out of a fluid or other covering. ... (09 Oct 1997) ...

emergence
Departure of fry from the incubation gravel into the water column. ... (09 Oct 1997) ...

emergencies
Situations or conditions having a high probability of disabling or immediately life-threatening consequences or requiring first aid or other immediate intervention. ... (12 Dec 1998) ...

emergency
An unexpected development or happening; a sudden need for action. ... Origin: L. E-mergo, pp. -mersus, to rise up, emerge, fr. Mergo, to plunge into, dip ... (05 Mar 2000) ...

emergency medical services
Services specifically designed, staffed, and equipped for the emergency care of patients. ... (12 Dec 1998) ...

emergency medical technicians
Paramedical personnel trained to provide basic emergency care and life support under the supervision of physicians and/or nurses. These services may be carried out at the site of the emergency, in the ambulance, or in a health care institution. ... (12 Dec 1998) ...

emergency medicine
A branch of medicine concerned with an individual's resuscitation, transportation and care from the point of injury or beginning of illness through the hospital or other emergency treatment facility. ... (12 Dec 1998) ...

emergency nursing
The specialty or practice of nursing in the care of patients admitted to the emergency department. ... (12 Dec 1998) ...

emergency physician
A specialist who is expert in the diagnosis and treatment of acute illness and injury. ... (27 Sep 1997) ...

emergency service, hospital
Hospital department responsible for the administration and provision of immediate medical or surgical care to the emergency patient. ... (12 Dec 1998) ...

emergency services, psychiatric
Organised services to provide immediate psychiatric care to patients with acute psychological disturbances. ... (12 Dec 1998) ...

emergency supplies kit
You and your family can cope best by preparing for disaster before it strikes. One way to prepare is by assembling a Disaster Supplies Kit. Once disaster hits, you won't have time to shop or search for supplies. But if you've gathered supplies in advance, your family can endure an evacuation or home confinement. For useful information, see the Medi …

emergency theory
A theory of the emotions, advanced by W.B. Cannon, that animal and human organisms respond to emergency situations by increased sympathetic nervous system activity including an increased catecholamine production with associated increases in blood pressure, heart and respiratory rates, and skeletal muscle blood flow. ... See: relaxation response. ... …

emergency treatment
First aid or other immediate intervention for accidents or medical conditions requiring immediate care and treatment before definitive medical and surgical management can be procured. ... (12 Dec 1998) ...

emergent
Any of various plants (as a cattail) rooted in shallow water and having most of the vegetative growth above the water. ... (09 Oct 1997) ...

emergent evolution
Appearance of a property in a complex system e.g., organism that could have been predicted only with difficulty, or perhaps not at all, from a knowledge and understanding of the individual genotype changes taken separately. ... (05 Mar 2000) ...

emerging viruses
In epidemiology, a class of viruses that have long infected humans or animals but now have the opportunity to attain epidemic proportions due to human encroachment on tropical rainforests, increased international travel, burgeoning populations in less developed countries, and, possibly, global warming. About two dozen viruses have been termed emerg …

emersed
Standing out of or rising above a surface as an aquatic plant with flower stalk emersed. ... (09 Oct 1997) ...

emersed plant
Plants growing with their roots and a portion of the shoot below the water and the remainder of the shoot above the surface of the water. ... (09 Oct 1997) ...

emersion
1. The act of emerging, or of rising out of anything; as, emersion from the sea; emersion from obscurity or difficulties. 'Their immersion into water and their emersion out of the same.' (Knatchbull) ... 2. <astronomy> The reappearance of a heavenly body after an eclipse or occultation; as, the emersion of the moon from the shadow of the earth …

emery
<chemical> Corundum in the form of grains or powder, used in the arts for grinding and polishing hard substances. Native emery is mixed with more or less magnetic iron. See the Note under Corundum. Emery board, cardboard pulp mixed with emery and molded into convenient. Emery cloth or paper, cloth or paper on which the powder of emery is spre …

emery disks
Disk's of paper or other materials coated with emery powder used to abrade or smooth the surface of teeth or fillings. ... (05 Mar 2000) ...

Emery-Dreifuss muscular dystrophy
A generally benign type of muscular dystrophy, with onset in childhood or early adulthood. Weakness begins with the pectoral girdle and proximal upper extremity muscles and spreads to the pelvic girdle and distal lower extremity muscles. Contractures of the elbow, flexors, neck flexors, and calf muscles often occur; muscle pseudohypertrophy and men …

Emery, Alan
<person> Contemporary British physician. ... See: Emery-Dreifuss muscular dystrophy. ... (05 Mar 2000) ...

emesis
Vomiting, an act of vomiting. Also used as a word termination, as in haematemesis. ... Origin: Gr. Emein = to vomit ... (18 Nov 1997) ...

emetic
<pharmacology> An agent that causes vomiting. ... Origin: Gr. Emetikos, L. Emeticus ... (18 Nov 1997) ...

emetics
Agents that cause vomiting. They may act directly on the gastrointestinal tract, bringing about emesis through local irritant effects, or indirectly, through their effects on the chemoreceptor trigger zone in the postremal area near the medulla. ... (12 Dec 1998) ...

emetocathartic
1. Both emetic and cathartic. ... 2. An agent that causes vomiting and purging of the lower intestines at the same time. ... Origin: Gr. Vomiting + E. Cathartic. ... (21 Jun 2000) ...

emetogenic
<pharmacology> Induces vomiting. ... Origin: Gr. Gennan = to produce ... (09 Oct 1997) ...

emetogenicity
The property of being emetogenic. ... (05 Mar 2000) ...

emew
Synonym for emu ... <zoology> A large Australian bird, of two species (Dromaius Novae-Hollandiae and D. Irroratus), related to the cassowary and the ostrich. The emu runs swiftly, but is unable to fly. ... Alternative forms: emeu and emew. ... The name is sometimes erroneously applied, by the Brazilians, to the rhea, or South American ostrich. E …

EMF
Synonym for electromotive force ... The force (measured in volts) that causes the flow of electricity from one point to another. ... (05 Mar 2000) ...

EMG
Synonym for electromyography ... <investigation> A test which measures muscle response to nerve stimulation. Used to evaluate muscle weakness and to determine if the weakness is related to the muscles themselves or a problem with the nerves that supply the muscles. ... Abnormal results may be seen in myasthenia gravis, polymyositis, carpal tunn …

EMG examination
Needle electrode examination portion of the electrodiagnostic examination (limited sense), synonym for entire electrodiagnostic examination, including not only the needle electrode examination (electromyogram proper), but the nerve conduction studies as well (expanded sense). ... (05 Mar 2000) ...

EMG syndrome
Synonym for Beckwith-Wiedemann syndrome ... <syndrome> This syndrome, of unknown cause, is characterised by a group of the following findings: large tongue, organ enlargement (visceromegaly), large body size, umbilical hernia and neonatal hypoglycaemia. Evidence suggests a genetic lesion. Birth weight is often more than 8 pounds. Complications …

EMI scan
Historically, the name commonly used for computed tomography of the head, the technique devised by Hounsfield, who was a scientist at EMI, an English electronics firm. ... (05 Mar 2000) ...

emiction
Rarely used term for urination. ... (05 Mar 2000) ...

emictory
Synonym for diuretic ... <pharmacology> An agent that promotes the excretion of urine. ... Origin: Gr. Diouretikos = promoting urine ... (18 Nov 1997) ...

emigration
The passage of white blood cells through the endothelium and wall of small blood vessels. ... Origin: L. E-migro, pp. -atus, to emigrate ... (05 Mar 2000) ...

emigration theory
Synonym for Cohnheim's theory ... That neoplasms originate from various cell rests, i.e., embryonal cells thought to persist in various sites after the development of the foetal organs and tissues. ... Synonym: emigration theory. ... (05 Mar 2000) ...

eminence
1. That which is eminent or lofty; a high ground or place; a height. 'Without either eminences or cavities.' (Dryden) 'The temple of honor ought to be seated on an eminence.' (Burke) ... 2. An elevated condition among men; a place or station above men in general, either in rank, office, or celebrity; social or moral loftiness; high rank; distinction …

eminence of concha
The prominence on the cranial surface of the auricle corresponding to the concha. ... Synonym: eminentia conchae, apophysis conchae. ... (05 Mar 2000) ...

eminence of scapha
The prominence on the cranial surface of the auricle corresponding to the scapha. ... Synonym: eminentia scaphae. ... (05 Mar 2000) ...

eminent
1. High; lofty; towering; prominent. 'A very eminent promontory.' ... 2. Being, metaphorically, above others, whether by birth, high station, merit, or virtue; high in public estimation; distinguished; conspicuous; as, an eminent station; an eminent historian, statements, statesman, or saint. Right of eminent domain. ... See Domain. ... Synonym: Lofty …

eminentia
Synonym: eminence. ... Origin: L. Prominence, fr. E-mineo, to stand out, project ... (05 Mar 2000) ...

eminentia abducentis
Synonym for facial colliculus ... Prominent portion of the medial eminence, just rostral to the medullary striae in the rhomboidal fossa; it is formed by the internal genu of the facial nerve and the abducens nucleus around which the facial fibres curve. ... Synonym: colliculus facialis, abducens eminence, eminentia abducentis, eminentia facialis, fa …

eminentia arcuata
Synonym for arcuate eminence ... A prominence on the anterior surface of the petrous portion of the temporal bone indicating the position of the superior semicircular canal. ... Synonym: eminentia arcuata. ... (05 Mar 2000) ...

eminentia carpi radialis
Synonym for radial eminence of wrist ... A rather large flat eminence on the radial side of the palmar aspect of the wrist, due to the tuberosity of scaphoid and the ridge on the trapezium. ... Synonym: eminentia carpi radialis. ... (05 Mar 2000) ...

eminentia carpi ulnaris
ulnar eminence of wrist ...

eminentia collateralis
Synonym for collateral eminence ... A longitudinal elevation of the floor of the collateral trigone of the lateral ventricle of the brain, between the hippocampus and the calcar avis, caused by the proximity of the floor of the collateral fissure. ... Synonym: eminentia collateralis. ... (05 Mar 2000) ...

eminentia conchae
Synonym for eminence of concha ... The prominence on the cranial surface of the auricle corresponding to the concha. ... Synonym: eminentia conchae, apophysis conchae. ... (05 Mar 2000) ...

eminentia cruciformis
Synonym for cruciform eminence ... Bony cross-like elevation on the internal aspect of the squamous portion of the occipital bone formed by the intersection of the groove for the transverse sinuses and the internal occipital crest, with the internal occipital protuberance at the centre of the 'cross.' ... Synonym: eminentia cruciformis, cruciate emin …

eminentia facialis
Synonym for facial colliculus ... Prominent portion of the medial eminence, just rostral to the medullary striae in the rhomboidal fossa; it is formed by the internal genu of the facial nerve and the abducens nucleus around which the facial fibres curve. ... Synonym: colliculus facialis, abducens eminence, eminentia abducentis, eminentia facialis, fa …

eminentia frontalis
An alternate term for frontal eminence, frontal eminence. ... (05 Mar 2000) ...

eminentia hypoglossi
Synonym for hypoglossal trigone ... A slight elevation in the floor of the inferior recess of the fourth ventricle, beneath which is the nucleus of origin of the twelfth cranial nerve. ... Synonym: trigonum nervi hypoglossi, eminentia hypoglossi, hypoglossal eminence, trigone of hypoglossal nerve, trigonum hypoglossi, tuberculum hypoglossi. ... (05 Ma …

eminentia hypothena'ris
An alternate term for hypothenar eminence. ... (05 Mar 2000) ...

eminentia iliopubica
Synonym for iliopubic eminence ... A rounded elevation on the superior surface of the hip bone at the junction of the ilium and the superior ramus of the pubis. ... Synonym: eminentia iliopubica, iliopectineal eminence. ... (05 Mar 2000) ...

eminentia intercondylaris
Synonym for intercondylar eminence ... Intercondyloid eminence, an elevation on the proximal extremity of the tibia between the two articular surfaces. ... Synonym: eminentia intercondylaris, eminentia intercondyloidea, spinous process of tibia. ... (05 Mar 2000) ...