Medical Dictionary


noun lac·tam \ˈlak-ˌtam\

Medical Definition of LACTAM

:  any of a class of amides of amino carboxylic acids that are formed by the loss of a molecule of water from the amino and carboxyl groups, that are characterized by the carbonyl-imido group −CONH− in a ring, and that include many antibiotics—compare lactim, lactone


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