beta-lactam
Lactam Lac"tam, n. [Lactone + amido.] (Chem.) One of a series of anhydrides of an amido type, analogous to the lactones, as oxindol; a cyclic amide. [1913 Webster]

{beta-lactam} or {[beta]-lactam}, (a) a lactam in which the amide bond is contained within a four-membered ring, which includes the amide nitrogen and the carbonyl carbon. (b) an antibiotic containing a beta-lactam, such as a {penicillin}, {cephalosporin}, or {carbapenem}; also called a {beta-lactam antibiotic}. [informal, laboratory slang] [PJC]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • beta-lactam — Lactam Lac tam, n. [Lactone + amido.] (Chem.) One of a series of anhydrides of an amido type, analogous to the lactones, as oxindol; a cyclic amide. [1913 Webster] {beta lactam} or {[beta] lactam}, (a) a lactam in which the amide bond is… …   The Collaborative International Dictionary of English

  • Beta-lactam — | | | | | | |A beta lactam ring (β lactam) or penam is a lactam with a heteroatomic ring structure, consisting of three carbon atoms and one nitrogen atom [Heterocyclic chemistry T.L. Gilchrist ISBN 0 582 01421 2 ] . Clinical significanceThe beta …   Wikipedia

  • beta-lactam — be·ta lac·tam or ß lactam .bāt ə lak .tam, chiefly Brit .bē tə n any of a large class of natural and semisynthetic antibiotics (as the penicillins and cephalosporins) with a lactam ring ß lactam, ß lactamase var of BETA LACTAM, BETA LACTAMASE …   Medical dictionary

  • beta-lactam — beta lac·tam …   English syllables

  • beta-lactam — noun A lactam having a four membered ring structure; a structural element of many antibiotics such as penicillin. Syn: penam …   Wiktionary

  • beta-lactam — /bitə ˈlæktæm/ (say beetuh laktam) noun a lactam with a ring structure comprising three carbon atoms and one nitrogen atom; characteristic of several families of antibiotics …   Australian English dictionary

  • beta-lactam — ¦ ̷ ̷  ̷ ̷ ˈ ̷ ̷ ˌ ̷ ̷ ,  ̷ ̷ ˈ ̷ ̷ noun : any of a large class of natural and semisynthetic antibiotics (as the penicillins and cephalosporins) with a lactam ring …   Useful english dictionary

  • beta-lactam antibiotic — Lactam Lac tam, n. [Lactone + amido.] (Chem.) One of a series of anhydrides of an amido type, analogous to the lactones, as oxindol; a cyclic amide. [1913 Webster] {beta lactam} or {[beta] lactam}, (a) a lactam in which the amide bond is… …   The Collaborative International Dictionary of English

  • Beta-lactam Ring Records — is an American record label that began in 2000 in Austin, Texas and relocated to [Portland, Oregon] in 2001. External links* [http://www.blrrecords.com// Official site] …   Wikipedia

  • Beta-lactam antibiotic — β lactam antibiotics are a broad class of antibiotics that include penicillin derivatives, cephalosporins, monobactams, carbapenems, and β lactamase inhibitors, that is, any antibiotic agent that contains a β lactam nucleus in its molecular… …   Wikipedia

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