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

ovular transmigration
The passage of an ovum from one ovary into the fallopian tube of the other side. ... (05 Mar 2000) ...

ovulate
To produce ovules. ... (09 Oct 1997) ...

ovulation
<gynaecology> The discharge of a secondary oocyte from a vesicular follicle of the ovary. ... (18 Nov 1997) ...

ovulation detection
Methods for recognition of the occurrence of ovulation. ... (12 Dec 1998) ...

ovulation induction
Techniques for the artifical induction of ovulation. ... (12 Dec 1998) ...

ovulation inhibitor
A compound that inhibits ovulation; often found in oral contraceptives. ... (05 Mar 2000) ...

ovulational sclerosis
Synonym for physiologic sclerosis ... A slowly progressive sclerosis in the walls of the ovarian arteries which commences after puberty. ... Synonym: menstrual sclerosis, ovulational sclerosis. ... (05 Mar 2000) ...

ovulatory
Relating to ovulation. ... (05 Mar 2000) ...

ovule
A structure in seed plants which contains the megasporangium (nucellus), megaspore (embryo sac), a food store, and a coat, and develops into a seed after fertilization. ... (09 Oct 1997) ...

ovuliferous
Bearing ovules (for example applied to scales in a megasporangiate cone in gymnosperms.) ... (09 Oct 1997) ...

ovulist
<biology> A believer in the theory (called encasement theory), current during the last century, that the egg was the real animal germ, and that at the time of fecundation the spermatozoa simply gave the impetus which caused the unfolding of the egg, in which all generations were inclosed one within the other. Also called ovist. ... Source: Web …

ovulocyclic
Denoting any recurrent phenomenon associated with and occurring at a certain time within the ovulatory cycle, as, for example, ovulocyclic porphyria. ... (05 Mar 2000) ...

ovulocyclic porphyria
Acute episodic exacerbations of porphyria occurring in the premenstrual period. ... (05 Mar 2000) ...

ovulode
In plants, sterile structures on the placenta. ... (09 Oct 1997) ...

ovum implantation
Endometrial implantation of the blastocyst. ... (12 Dec 1998) ...

ovum implantation, delayed
Delay of embryonal development whereby the blastocyst remains in the uterine cavity for a variable period of time before attaching to the endometrium and continuing its development. ... (12 Dec 1998) ...

ovum transport
Transport of the ovum or zygote from the site of ovulation to the site of implantation. ... (12 Dec 1998) ...

owe
1. To possess; to have, as the rightful owner; to own. 'Thou dost here usurp The name thou ow'st not.' (Shak) ... 2. To have or possess, as something derived or bestowed; to be obliged to ascribe (something to some source); to be indebted or obliged for; as, he owed his wealth to his father; he owed his victoty to his lieutenants.' 'O deem thy fall …

Owen, Sir Richard
<person> English anatomist, 1804-1892. ... See: Owen's lines, contour lines of Owen, interglobular space of Owen. ... (05 Mar 2000) ...

Owen's lines
Accentuated incremental line's in the dentin thought to be due to disturbances in the mineralization process. ... Synonym: contour lines of Owen. ... (05 Mar 2000) ...

owl
1. <ornithology> Any cpecies of raptorial birds of the family Strigidae. They have large eyes and ears, and a conspicuous circle of feathers around each eye. They are mostly nocturnal in their habits. ... Some species have erectile tufts of feathers on the head. The feathers are soft and somewhat downy. The species are numerous. See Barn owl, …

owl eye cell
<pathology> Enlarged cells infected with cytomegalovirus that contain large inclusion bodies surrounded by a halo, hence the name. ... (18 Nov 1997) ...

own
To grant; to acknowledge; to admit to be true; to confess; to recognize in a particular character; as, we own that we have forfeited your love. 'The wakeful bloodhound rose, and shook his hide But his sagacious eye an inmate owns.' (Keats) ... Origin: OE. Unnen to grant, permit, be pleased with, AS. Unnan to grant; akin to OS. Giunnan, G. Gonnen, Ic …

own controls
A method of experimental control in which the same subjects are used in both experimental and control conditions. ... (05 Mar 2000) ...

ownership
The ownership of any object, property, or facility, including proprietary, public, non-profit, secular, physician-owned, etc. ... (12 Dec 1998) ...

Owren, Paul
<person> Norwegian haematologist, *1905. ... See: Owren's disease. ... (05 Mar 2000) ...

Owren's disease
A congenital deficiency of factor V, resulting in prolongation of prothrombin time and coagulation time. ... (05 Mar 2000) ...

ox
<zoology> The male of bovine quadrupeds, especially the domestic animal when castrated and grown to its full size, or nearly so. The word is also applied, as a general name, to any species of bovine animals, male and female. 'All sheep and oxen, yea, and the beasts of the field.' (Ps. Viii. 7) ... The castrated male is called a steer until it …

ox bots
Cattle grub, the larvae of the warble flies, Hypoderma bovis and H. Lineatum. ... (05 Mar 2000) ...

ox heart
<anatomy, cardiology, pathology> A very large heart usually due to chronic hypertension or, more often to aortic valve disease. ... Synonym: bucardia, cor bovinum. ... (05 Mar 2000) ...

oxa-
Combining form inserted in names of organic compounds to signify the presence or addition of oxygen atom(s) in a chain or ring (as in ethers), not appended to either (as in ketones and aldehydes). ... See: hydroxy-, oxo-, oxy-. ... Origin: English. Oxygen ... (05 Mar 2000) ...

oxacillin
<chemical> A semisynthetic penicillanase-resistant penicillin, used primarily in the treatment of infections to penicillinase-resistant staphylococci. ... Pharmacological action: penicillins. ... Chemical name: 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 3,3-dimethyl-6-(((5-methyl-3-phenyl-4-isoxazolyl)carbonyl)amino)-7-oxo-, (2S-(2alp …

oxacillin sodium
5-Methyl-3-phenyl-4-isoxazolylpenicillin sodium;a semisynthetic penicillin used in the oral therapy of penicillin-resistant staphylococcal infections. ... (05 Mar 2000) ...

oxalaemia
The presence of an abnormally large amount of oxalates in the blood. ... Origin: oxalate + G. Haima, blood ... (05 Mar 2000) ...

oxalate
A salt of oxalic acid, salts of oxalic acid are found in kidney stones in those with primary hyperoxaluria or oxalosis. ... (27 Sep 1997) ...

oxalate calculus
A hard urinary calculus of calcium oxalate; some are covered with minute sharp spines that can abrade the renal pelvic epithelium, whereas others are smooth. ... (05 Mar 2000) ...

oxalic
<chemistry> Pertaining to, derived from, or contained in, sorrel, or oxalis; specifically, designating an acid found in, and characteristic of, oxalis, and also certain plant of the Buckwheat family. ... <chemistry> Oxalic acid, a dibasic acid, existing combined in oxalis as an acid potassium oxalate, and in many plant tissues as the cal …

oxalic acid
Occurs in plants and is toxic to higher animals by virtue of its calcium binding properties, it causes the precipitation of calcium oxalate in the kidneys, prevents calcium uptake in the gut and is not metabolised. ... (18 Nov 1997) ...

oxalo
The monoacyl radical, HOOC-C(O)-. ... (05 Mar 2000) ...

oxaloacetate
<biochemistry> Metabolic intermediate. Couples with acetyl CoA to form citrate, i.e. The entry point of the tricarboxylic acid cycle. Formed from aspartic acid by transamination. ... (18 Nov 1997) ...

oxaloacetate tautomerase
<enzyme> From fuma gene of E coli; catalyses the isomerization of enol to keto oxalacetic acid ... Registry number: EC 5.3.2.2 ... Synonym: oxaloacetate keto-enol tautomerase, fumarase a, oxalacetic acid keto-enol isomerase, oaake isomerase ... (26 Jun 1999) ...

oxaloacetate transacetase
Synonym for citrate synthase ... Citrate (si)-synthase;an enzyme catalyzing the condensation of oxaloacetate, water, and acetyl-CoA, forming citrate and coenzyme A; an important step in the tricarboxylic acid cycle. ... Synonym: citrogenase, condensing enzyme, oxaloacetate transacetase. ... (05 Mar 2000) ...

oxaloacetic acid
HOOC-CO-CH2COOH;a ketodicarboxylic acid and important intermediate in the tricarboxylic acid cycle; the product formed when l-aspartic acid acts as an amine donor in transamination reactions. ... Synonym: ketosuccinic acid, oxosuccinic acid. ... (05 Mar 2000) ...

oxalosis
A genetic disease of autosomal recessive inheritance that results in the deposition of calcium oxalate in the genitourinary system and kidneys (nephrocalcinosis). Usually evident in the first decade of life, progressive renal failure is not uncommon. ... Inheritance: autosomal recessive. ... (27 Sep 1997) ...

oxalosuccinic acid
HOOC-CO-CH(COOH)-CH2-CO OH;the product of the dehydrogenation of isocitric acid under the catalytic influence of isocitrate dehydrogenase; an enzyme-bound intermediate of the tricarboxylic acid cycle. ... (05 Mar 2000) ...

oxalosuccinic carboxylase
Synonym for isocitrate dehydrogenase ... <enzyme> An enzyme of the oxidoreductase class that catalyses the conversion of isocitrate and NAD+ to yield 2-ketoglutarate, carbon dioxide, and NADH. It occurs in cell mitochondria. The enzyme requires magnesium, mn2+; it is activated by ADP, citrate, and calcium, and inhibited by NADH, NADPH, and ATP …

oxalourea
Synonym for oxalylurea ... The cyclic (end-to-end) amide anhydride of oxaluric acid; an oxidation product of uric acid. ... Synonym: oxalourea, parabanic acid. ... (05 Mar 2000) ...

oxaluria
Synonym: hyperoxaluria. ... Origin: oxalate + G. Ouron, urine ... (05 Mar 2000) ...

oxaluric acid
NH2CONHCOCOOH;the ureide of oxalic acid, derived from uric acid or oxalylurea. ... (05 Mar 2000) ...

oxalyl CoA decarboxylase
<enzyme> Catalyses the thiamine ppi-dependent decarboxylation of oxalyl-CoA to formate and carbon dioxide ... Registry number: EC 4.1.1.8 ... Synonym: oxalyl coenzyme a decarboxylase ... (26 Jun 1999) ...

oxalylurea
The cyclic (end-to-end) amide anhydride of oxaluric acid; an oxidation product of uric acid. ... Synonym: oxalourea, parabanic acid. ... (05 Mar 2000) ...

oxamate carbamoyltransferase
<enzyme> Phosphorylises oxalurate to oxamate ... Registry number: EC 2.1.3.5 ... (26 Jun 1999) ...

oxamic acid
<chemical> Amino-substituted glyoxylic acid derivative. ... Chemical name: Acetic acid, aminooxo- ... (12 Dec 1998) ...

oxamniquine
<chemical> An anthelmintic with schistosomicidal activity against schistosoma mansoni, but not against other schistosoma spp. Oxamniquine causes worms to shift from the mesenteric veins to the liver where the male worms are retained; the female worms return to the mesentery, but can no longer release eggs. ... Pharmacological action: schistoso …

oxanamide
2-Ethyl-3-propylglycidamide;a sedative. ... (05 Mar 2000) ...

oxandrolone
<chemical> (5 alpha,17 beta)-17-hydroxy-17-methyl-2-oxaandrostan-3-one. A synthetic hormone with anabolic and androgenic properties. ... Pharmacological action: anabolic steroids. ... Chemical name: 2-Oxaandrostan-3-one, 17-hydroxy-17-methyl-, (5alpha,17beta)- ... (12 Dec 1998) ...

oxaphenamide
4'-Hydroxysalicylanilide;a choleretic. ... (05 Mar 2000) ...

oxazepam
This prescription drug is used as a sedative and to treat anxiety. ... (09 Oct 1997) ...

oxazin
C12H10ON2; Oxyiminodiphenylimine;parent substance of a series of biological dyes, e.g., gallocyanin, brilliant cresyl blue, cresyl violet acetate. ... (05 Mar 2000) ...

oxazin dyes
Similar to azin dye's except that one of the connecting N atoms is replaced by O; most important representatives are brilliant cresyl blue, orcein, litmus, and cresyl violet. ... (05 Mar 2000) ...

oxazocines
One ring heterocyclic compounds defined by c6h7no. Permitted are any degree of hydrogenation, any substituents and any ortho-fused or ortho-peri-fused ring systems. ... (12 Dec 1998) ...

oxazole
The fundamental ring system. ... (05 Mar 2000) ...

oxazoles
Five-membered heterocyclic ring structures containing an oxygen in the 1-position and a nitrogen in the 3-position. ... (12 Dec 1998) ...

oxazolidinediones
An obsolescent chemical class of antiepileptic drugs useful in the treatment of absence (petit mal) seizures; examples include trimethadione and paramethadione. ... (05 Mar 2000) ...

oxazolone
<chemical> 2-phenyl-4-ethoxymethylene-5-oxazolone. Immunologic adjuvant and sensitizing agent. ... Pharmacological action: adjuvants, immunologic. ... Chemical name: 5(4H)-Oxazolone, 4-(ethoxymethylene)-2-phenyl- ... (12 Dec 1998) ...

oxbow
A frame of wood, bent into the shape of the letter U, and embracing an ox's neck as a kind of collar, the upper ends passing through the bar of the yoke; also, anything so shaped, as a bend in a river. ... (01 Mar 1998) ...

oxeladin
2-Ethyl-2-phenylbutyric acid 2-(2-diethylaminoethoxy)ethyl ester;an antitussive agent. ... (05 Mar 2000) ...

oxeye
1. <botany> The oxeye daisy. See Daisy. The corn camomile (Anthemis arvensis). ... A genus of composite plants (Buphthalmum) with large yellow flowers. ... 2. <zoology> A titmouse, especially the great titmouse (Parus major) and the blue titmouse (P. Coeruleus). The dunlin. ... A fish; the bogue, or box. ... <botany> Creeping oxeye, a …

Oxford unit
<microbiology> The minimum amount of penicillin which will prevent the growth of Staphylococcus aureus over an area 26 mm in diameter in a standard culture medium; 1 unit equals 0.6 ug of crystalline sodium salt of penicillin. ... Synonym: Florey unit. ... (05 Mar 2000) ...

oxic
Containing oxygen, aerobic. Usually used in reference to a microbial habitat. ... (09 Oct 1997) ...

oxiconazole
Broad spectrum antifungal agent resembling ketoconazole. ... (05 Mar 2000) ...

oxidant
A molecule or atom that accepts electrons in an oxidation-reduction reaction. ... (09 Oct 1997) ...

oxidants
Oxidizing agents or electron-accepting molecules in chemical reactions in which electrons are transferred from one molecule to another (oxidation-reduction). In vivo, it appears that phagocyte-generated oxidants function as tumour promoters or cocarcinogens rather than as complete carcinogens perhaps because of the high levels of endogenous antioxi …

oxidants, photochemical
Compounds that accept electrons in an oxidation-reduction reaction. The reaction is induced by or accelerated by exposure to electromagnetic radiation in the spectrum of visible or ultraviolet light. ... (12 Dec 1998) ...

oxidase
Classically, one of a group of enzymes, now termed oxidoreductases (EC class 1), that bring about oxidation by the addition of oxygen to a metabolite or by the removal of hydrogen or of one or more electrons. Oxidase is now used for those cases in which O2 acts as an acceptor (of H or of electrons); those removing hydrogen are now termed dehydrogen …

oxidase reaction
The formation of indol blue when a blood smear containing myeloid leukocytes is treated with a mixture of alpha-naphthol and p-dimethylaniline sulfate; the myeloid leukocytes contain an oxidase that catalyses this reaction, the lymphoid leukocytes do not, in bacteriology, a reaction that depends on the presence of certain oxidases in some bacteria …

oxidase test
A colon test for the presence of intracellular cytochrome oxidase based on the reaction with p-phenylenediamine; aids in the identification of Neisseria species and Pseudomonadaceae. ... (05 Mar 2000) ...

oxidasis
Oxidation by an oxidase. ... (05 Mar 2000) ...

oxidation
<biochemistry> The process whereby fatty acids are degraded in steps, losing 2 carbons as (acetyl) CoA. Involves CoA ester formation, desaturation, hydroxylation and oxidation before each cleavage. ... (18 Nov 1997) ...

oxidation number
The number of electrons necessary to restore an atom in a combined state to its elemental form. ... (09 Oct 1997) ...

oxidation pond
A pond that contains partially treated wastewater which is then left to allow the growth of algae and bacteria which decompose therest of the waste. ... (09 Oct 1997) ...

oxidation-fermentation test
<investigation> A test to to determine whether a given bacterial strain has an oxidative or fermentativetype of metabolism by seeing what it doesto a carbohydrate substrate. ... (09 Oct 1997) ...

oxidation-reduction
A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs. ... (12 Dec 1998) ...

oxidation-reduction electrode
An electrode capable of measuring oxidation-reduction potential. ... See: quinhydrone electrode. ... Synonym: redox electrode. ... (05 Mar 2000) ...

oxidation-reduction indicator
A substance that undergoes a definite colour change at a specific oxidation potential. ... Synonym: redox indicator. ... (05 Mar 2000) ...

oxidation-reduction potential
<chemistry, physics> The potential in volts of an inert metallic electrode measured in a system of an arbitrarily chosen ratio of [oxidant] to [reductant] and referred to the normal hydrogen electrode at absolute temperature. ... It is calculated from the following equation: where R is the gas constant expressed in electrical units, T the abso …

oxidation-reduction reaction
<chemistry> Any reaction in which electrons are removed from one molecule or atom and given to another molecule or atom. ... (09 Oct 1997) ...

oxidation-reduction system
<enzyme> An enzyme system in the tissues by which oxidation and reduction proceed simultaneously through the transference of hydrogen or of one or more electrons from one metabolite to another. ... See: oxidation-reduction. ... Synonym: redox system. ... (05 Mar 2000) ...

oxidative
Having the power to oxidise; denoting a process involving oxidation. ... (05 Mar 2000) ...

oxidative metabolism
Respiration in the biochemical sense. ... (18 Nov 1997) ...

oxidative phosphorylation
<biochemistry> The phosphorylation of ATP coupled to the respiratory chain. ... (18 Nov 1997) ...

oxidative stress
A highly oxidized environment within cells that is thought to promote HIV replication because cells are forced into a highly activated state due to loss of control of their regulatory systems. ... (09 Oct 1997) ...

oxide
<chemistry> Any element (but especially a metal) that has formed a binary compound with oxygen. ... (09 Oct 1997) ...

oxides
<chemistry> Binary compounds of oxygen containing the anion o(2-). The anion combines with metals to form alkaline oxides and non-metals to form acidic oxides. ... (12 Dec 1998) ...

oxidise
<chemistry> To combine or cause an element or radical to combine with oxygen or to lose electrons. ... (05 Mar 2000) ...

oxidised cellulose
<surgery> Cellulosic acid in the form of an absorbable gauze which is used as a haemostatic in operations where ligation is not feasible (capillary or venous bleeding from small vessels) because cellulosic acid has a pronounced affinity for haemoglobin and produces an artificial clot. ... It is a sterile absorbable substance prepared by the ox …

oxidised glutathione
<biochemistry> Glutathione acting in cells as a hydrogen acceptor; reduced by glutathione reductase. ... (05 Mar 2000) ...

oxidize
<chemistry> To combine with oxygen, or subject to the action of oxygen, or of an oxidizing agent. Specifically: ... To combine with oxygen or with more oxygen; to add oxygen to; as, to oxidize nitrous acid so as to form nitric acid. ... To remove hydrogen from (anything), as by the action of oxygen; as, to oxidize alcohol so as to form aldehyde …

oxidized rhizosphere
Oxidized channels and soil surrounding living roots and rhizomes in plants. ... (09 Oct 1997) ...

oxidizing agent
<chemistry> A reactant that accepts electrons from another reactant. The oxidizing agent is the species getting reduced. ... (09 Jan 1998) ...