/ Dictionary / Index C cyclopropane: Meaning and Definition of Find definitions for: cy•clo•pro•pane Pronunciation: (sī"klu-prō'pān, sik"lu-), [key] — n. Chem., Pharm. a colorless, flammable gas, CH, used in organic synthesis and in medicine as an anesthetic. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cyclopropane (Thesaurus) cycloplegia Cyclops 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