a synthetic nonnarcotic and nonaddictive analgesic, C18H25NO, that blocks the effects of morphine or morphinelike drugs: used to treat heroin or morphine addiction.
Main Entry: cy·claz·o·cine Pronunciation: sI-'klaz-&-"sEn, -s&n Function: noun : an analgesic drugC18H25NO that inhibits the effect of morphine and related addictive drugs and is used in the treatment of drug addiction
[sahy-klaz-uh-seen, -sin, sahy-kluh-zoh-seen, -sin] 
