/ Dictionary / Index C coccolith: Meaning and Definition of Find definitions for: coc•co•lith Pronunciation: (kok'u-lith"), [key] — n. a microscopic calcareous disk or ring making up part of the covering of certain marine plankton and forming much of the content of chalk rocks. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. coccoid coccus Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language