/ Dictionary / Index C cymogene: Meaning and Definition of Find definitions for: cy•mo•gene Pronunciation: (sī'mu-jēn"), [key] — n. Chem. a volatile, flammable petroleum distillate containing a large percentage of butane. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cymo- cymograph Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language