lactam

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Related to Beta-lactam Ring: beta-lactamase

lac·tam

 (lăk′tăm)
n.
A cyclic amide, or any compound containing it, formed by the intramolecular condensation of an amino carboxylic acid.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

lactam

(ˈlæktæm)
n
(Elements & Compounds) chem any of a group of inner amides, derived from amino acids, having the characteristic group -CONH-
[C20: from lact(one) + am(ide)]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

lac•tam

(ˈlæk tæm)

n.
any of a group of cyclic amides characterized by the NHCO group.
[1880–85; lact (one) + am (ide)]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Cephalosporins contain beta-lactam ring in their outer structure which is cleaved by beta-lactamases.
For example, one major family of antibiotics is based on what's known as a "beta-lactam ring" molecule, and includes penicillins and cephalosporins.

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