/ Dictionary / Index C cytoplasm: Meaning and Definition of Find definitions for: cy•to•plasm Pronunciation: (sī'tu-plaz"um), [key] — n. Cell Biol. the cell substance between the cell membrane and the nucleus, containing the cytosol, organelles, cytoskeleton, and various particles. See diag. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cytoplasm (Thesaurus) cytophotometer cytoplast Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language