/sef'euh loh spawr"in, -spohr"-/ , n. Pharm.
any of a group of widely used broad-spectrum antibiotics, originally isolated as a product of fermentation from the fungus Cephalosporium acremonium.
[ 1950-55; Cephalospor ( ium ) the genus (see CEPHALO-, -SPORE, -IUM) + -IN 2 ]