/ Dictionary / Index C cell line: Meaning and Definition of Find definitions for: cell' line" Pronunciation: [key] — Cell Biol. Cell Biol. a perpetuating strain of cells in laboratory culture. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cellist cellmate Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language