/ Dictionary / Index C cyclazocine: Meaning and Definition of Find definitions for: cy•claz•o•cine Pronunciation: (sī-klaz'u-sēn", -sin, sī"klu-zō'sēn, -sin), [key] — n. Pharm. a synthetic nonnarcotic and nonaddictive analgesic, CHNO, that blocks the effects of morphine or morphinelike drugs: used to treat heroin or morphine addiction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cyclase cycle Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language