beta-lactam

noun
be·​ta-lac·​tam
variants: or β-lactam \ ˌbāt-​ə-​ˈlak-​ˌtam, chiefly British ˌbē-​tə-​ \

Medical Definition of beta-lactam

: any of a large class of natural and semisynthetic antibiotics (as the penicillins and cephalosporins) with a lactam ring

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to gather or build up little by little

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