/ Dictionary / Index C coccus: Meaning and Definition of Find definitions for: coc•cus Pronunciation: (kok'us), [key] — pl. -ci a spherical bacterium. See diag. under one of the carpels of a schizocarp. -coccus Pronunciation: [key] a combining form representingin compound words: streptococcus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: coccus (Thesaurus) coccolith coccyx Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language