/ Dictionary / Index C cyto-: Meaning and Definition of Find definitions for: cyto- Pronunciation: [key] a combining form meaning “cell,” used in the formation of compound words: cytoplasm. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cytidine monophosphate cytoanalyzer Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language