| betaxolol hydrochloride | 1-[4-[2-(cyclopropylmethoxy)ethyl]phenoxy]-3-isopropylaminopropan-2-ol hydrochloride;a beta-adrenergic blocking agent used primarily in the treatment of ocular hypertension and chronic open-angle glaucoma. (05 Mar 2000) |
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| betazole | <chemical> 3-(beta-aminoethyl)pyrazole. A histamine h2 agonist used clinically to test gastric secretory function. Pharmacological action: gastrointestinal agents, histamine agonist. Chemical name: 1H-Pyrazole-3-ethanamine (12 Dec 1998) |
| betazole hydrochloride | An analogue of histamine that stimulates gastric secretion with less tendency to produce the side effects seen with histamine; used, in place of histamine, to measure the gastric secretory response. (05 Mar 2000) |
| betel | <botany> A species of pepper (Piper betle), the leaves of which are chewed, with the areca or betel nut and a little shell lime, by the inhabitants of the East Indies. I is a woody climber with ovate manynerved leaves. Origin: Pg, fr. Tamil vettilei, prop. Meaning, a mere leaf. Source: Websters Dictionary (01 Mar 1998) |
| betel nut | The nutlike seed of the areca palm, chewed in the East with betel leaves (whence its name) and shell lime. Source: Websters Dictionary (01 Mar 1998) |
| betelguese | <astronomy> A bright star of the first magnitude, near one shoulder of Orion. Alternative forms: Betelgeux and Betelgeuse. Origin: F. Betelgeuse, of Arabic origin. Source: Websters Dictionary (01 Mar 1998) |
| bethabara wood | <botany> A highly elastic wood, used for fishing rods, etc. The tree is unknown, but it is thought to be East Indian. Source: Websters Dictionary (01 Mar 1998) |
| bethanechol | <chemical> A slowly hydrolyzed muscarinic agonist with no nicotinic effects. Bethanechol is generally used to increase smooth muscle tone, as in the GI tract following abdominal surgery or in urinary retention in the absence of obstruction. It may cause hypotension, cardiac rate changes, and bronchial spasms. Pharmacological action: muscarinic agonist, parasympathomimetic. Chemical name: 1-Propanaminium, 2-((aminocarbonyl)oxy)-N,N,N-trimethyl- (12 Dec 1998) |
| bethanechol chloride | Carbamoylmethylcholine chloride; (2-hydroxypropyl)trimethylammonium chloride carbamate;a parasympathomimetic agent, used to relieve constipation, paralytic ileus, and urinary retention. (05 Mar 2000) |
| bethanidine | <chemical> 1-benzyl-2,3-dimethylguanidine sulfate. A guanidinium antihypertensive agent that acts by blocking adrenergic transmission. The precise mode of action is not clear. Pharmacological action: adrenergic agents, antihypertensive agents, sympatholytics. Chemical name: Guanidine, N,N'-dimethyl-N''-(phenylmethyl)- (12 Dec 1998) |
| bethanidine sulfate | 1-benzyl-2,3-dimethylguanidine;an adrenergic blocking agent used for palliative treatment of hypertension. Synonym: betanidine sulfate. (05 Mar 2000) |
| Bethesda system | Recent classification for categorizing cervical Papanicolaou smears. Origin: Bethesda, Maryland, site of NIH (05 Mar 2000) |
| Bethesda unit | A measure of inhibitor activity: the amount of inhibitor that will inactivate 50% or 0.5 unit of a coagulation factor during the incubation period. Origin: Bethesda, MD (05 Mar 2000) |
| Bethesda-Ballerup Group | A group of citrate-utilizing, slow lactose-fermenting bacteria (family Enterobacteriaceae) which share a similar series of antigens with the lactose-fermenting citrobacters; these organisms are now included in the genus Citrobacter without a distinction between prompt and slow lactose fermentation. (05 Mar 2000) |
| Betke-Kleihauer test | A slide test for the presence of foetal red blood cells among those of the mother; haemoglobins other than Hb F are eluted from the red blood cells on an air-dried blood film by a buffer of pH 3.3. (05 Mar 2000) |