| penicillin phenoxymethyl | <chemical> (2s-(2 alpha,5 alpha,6 beta)-3,3-dimethyl-7-oxo-6-((phenoxyacetyl)amino)-4-thia-1- azabicyclo(3.2.0)heptane-2-carboxylic acid. A broad-spectrum penicillin antibiotic used orally in the treatment of mild to moderate infections by susceptible gram-positive organisms. Pharmacological action: penicillins. Chemical name: 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-((phenoxyacetyl)amino)-, (2S-(2alpha,5alpha,6beta))- (12 Dec 1998) |
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| penicillin resistance | <microbiology, pharmacology> Nonsusceptibility of an organism to the action of penicillins. (12 Dec 1998) |
| penicillin v | <chemical> (2s-(2 alpha,5 alpha,6 beta)-3,3-dimethyl-7-oxo-6-((phenoxyacetyl)amino)-4-thia-1- azabicyclo(3.2.0)heptane-2-carboxylic acid. A broad-spectrum penicillin antibiotic used orally in the treatment of mild to moderate infections by susceptible gram-positive organisms. Pharmacological action: penicillins. Chemical name: 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-((phenoxyacetyl)amino)-, (2S-(2alpha,5alpha,6beta))- (12 Dec 1998) |
| penicillin V benzathine | Benzathine phenoxymethylpenicillin;penicillin for oral use. (05 Mar 2000) |
| penicillin V hydrabamine | Hydrabamine phenoxymethylpenicillin;a compound with preparation and uses analogous to those of penicillin G hydrabamine. (05 Mar 2000) |
| chloroprocaine penicillin O | A crystalline salt of 2-chloroprocaine and penicillin O, insoluble in water; the level of the antibiotic in the blood persists for 24 hours; its antibacterial activity is similar to that of penicillin O and G. (05 Mar 2000) |
| absolute unit | A unit whose value is constant regardless of place or time and not derived from dependent on gravitation. (05 Mar 2000) |
| alexin unit | The smallest amount (highest dilution) of complement that will cause haemolysis of a unit of red blood cells in the presence of a haemolysin unit. Synonym: alexin unit. (05 Mar 2000) |
| Allen-Doisy unit | The quantity of oestrogen capable of producing in a spayed mouse a characteristic change in the vaginal epithelium, namely, disappearance of leukocytes and appearance of cornified cells, as determined by a vaginal smear; equal approximately to one-half of an estrone unit. Synonym: mouse unit. (05 Mar 2000) |
| amboceptor unit | haemolysin unit |
| androgen unit | The androgenic activity of 100 ug (0.1 mg) of crystalline androsterone as assayed by the comb growth response in capons. (05 Mar 2000) |
| antigen unit | The smallest amount of antigen that, in the presence of specific antiserum, will fix 1 complement unit. (05 Mar 2000) |
| antitoxin unit | A unit expressing the strength or activity of an antitoxin; in general, determined with reference to a preserved standard preparation of antitoxin. See: L doses. (05 Mar 2000) |
| antivenene unit | The amount of antivenum which, injected in the ear vein, will protect 1 g weight of rabbit against a fatal dose of snake venom. (05 Mar 2000) |
| atomic mass unit | <chemistry> One-twelfth the mass of a neutral atom of the most abundant isotope of carbon. (16 Dec 1997) |