/ Dictionary / Index C cyclodiene: Meaning and Definition of Find definitions for: cy•clo•di•ene Pronunciation: (sī"klu-dī'ēn, -dī-ēn'), [key] — n. Chem. any of several organic chemicals having a chlorinated methylene group bonded to two carbon atoms of a 6-membered carbon ring, used commercially in insecticides. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cyclo-cross cyclogenesis Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language