| atrabiliary | 1. Of or pertaining to atra bilis or black bile, a fluid formerly supposed to be produced by the kidneys. 2. Melancholic or hypohondriac; atrabilious; from the supposed predominance of black bile, to the influence of which the ancients attributed hypochondria, melancholy, and mania. <anatomy> Atrabiliary arteries, capsules, and veins, those pertaining to the kidney; called also renal arteries, capsules, and veins. Source: Websters Dictionary (01 Mar 1998) |
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| atrabiliary capsule | See adrenal gland. (12 Dec 1998) |
| atractosylidic acid | The steroid aglycon and toxic principle of atractylic acid. Synonym: atractosylidic acid, atractylin. (05 Mar 2000) |
| atractylic acid | A highly poisonous steroid glycoside from Atractylis gummifera L. (Compositae), having a strychnine-like action that produces convulsions of a hypoglycaemic nature; the aglycon, atractyliginin, is combined with glucose and isovaleric acid, and is the toxic principle. Atractylic acid interferes with oxidative reactions, the citric acid cycle, and nerve conduction. (05 Mar 2000) |
| atractyligenin | The steroid aglycon and toxic principle of atractylic acid. Synonym: atractosylidic acid, atractylin. (05 Mar 2000) |
| atractylin | The steroid aglycon and toxic principle of atractylic acid. Synonym: atractosylidic acid, atractylin. (05 Mar 2000) |
| atractyloside | <chemical> 15 alpha-hydroxy-2-[[2-o-)3-methyl-1-oxobutyl)-3,4-di-o-sulfo-alpha-d-glucopyranosyl]oxy]-19-norkaur-16-en-18-oic acid dipotassium salt. A toxic glycoside from atractylis gummifera which inhibits the transfer of ADP and ATP across the mitochondrial membrane by a specific carrier. Also inhibits oxidative phosphorylation of externally added ADP in isolated mitochondria. Chemical name: 19-Norkaur-16-en-18-oic acid, 15-hydroxy-2-((2-O-(3-methyl-1-oxobutyl)-3,4-di-O-sulfo-beta-D-glucopyranosyl)oxy)-, dipotassium salt, (2beta,4alpha,15alpha)- (12 Dec 1998) |
| atracurium | <chemical> A non-depolarising neuromuscular blocking agent with short duration of action. Its lack of significant cardiovascular effects and its lack of dependence on good kidney function for elimination provide clinical advantage over alternate non-depolarising neuromuscular blocking agents. Pharmacological action: neuromuscular nondepolarising agents, nicotinic antagonists. Chemical name: Isoquinolinium, 2,2'-(1,5-pentanediylbis(oxy(3-oxo-3,1-propanediyl)))bis(1-((3,4-dimethoxyphenyl)methyl)-1,2,3,4-tetrahydro-6,7-dimethoxy-2-methyl- (12 Dec 1998) |
| atracurium besylate | C65H82N2O18S 2;a non-depolarising neuromuscular relaxant of intermediate duration of action; used as an adjunct to general anaesthesia; a curare-like agent. (05 Mar 2000) |
| atraumatic needle | An eyeless surgical needle with the suture permanently fastened into a hollow end. (05 Mar 2000) |
| atraumatic suture | A suture swaged onto the end of an eyeless needle. (05 Mar 2000) |
| atrazine | <chemical> A selective triazine herbicide. Inhalation hazard is low and there are no apparent skin manifestations or other toxicity in humans. Acutely poisoned sheep and cattle may show muscular spasms, faciculations, stiff gait, increased respiratory rates, adrenal degeneration, and congestion of the lungs, liver, and kidneys. Pharmacological action: herbicides, triazine. Chemical name: 1,3,5-Triazine-2,4-diamine, 6-chloro-N-ethyl-N'-(1-methylethyl)- (12 Dec 1998) |
| atrazine chlorohydrolase | <enzyme> An atrazine-dechlorinating enzyme with restricted substrate specificity and contributes to the microbial hydrolysis of atrazine to hydroxyatrazine in soils and groundwater; genbank u55933 Registry number: EC 3.8.1.- Synonym: atza protein, atza gene protein (26 Jun 1999) |
| atrepsy | Synonym: athrepsia. Origin: G. A-priv. + trepho, to nourish (05 Mar 2000) |
| atresia | <medicine> Absence or closure of a natural passage or channel of the body; imperforation. Origin: NL, fr. Gr. Not perforated. Source: Websters Dictionary (01 Mar 1998) |