/ Dictionary / Index C cytosome: Meaning and Definition of Find definitions for: cy•to•some Pronunciation: (sī'tu-sōm"), [key] — n. Biol. the cytoplasmic part of a cell. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cytosol cytost Related Content Daily Word Quiz: rarefied Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language