. "\"The chemical reactions and pathways resulting in the formation of a beta-lactam antibiotic, any member of a class of natural or semisynthetic antibiotics whose characteristic feature is a strained, four-membered beta-lactam ring. They include the penicillins and many of the cephalosporins.\" [GOC:mah, ISBN:0198506732]" . . "beta-lactam antibiotic biosynthetic process" . "beta-lactam antibiotic anabolism" . "beta-lactam antibiotic biosynthesis" . "beta-lactam antibiotic formation" . "beta-lactam antibiotic synthesis" . . . . . .