/ Dictionary / Index C cephalosporin: Meaning and Definition of Find definitions for: ceph•a•lo•spo•rin Pronunciation: (sef"u-lō-spôr'in, -spōr'-), [key] — n. Pharm. any of a group of widely used broad-spectrum antibiotics, originally isolated as a product of fermentation from the fungus Cephalosporium acremonium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cephalosporin (Thesaurus) cephalopod cephalothorax Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language