Dictionarychlor•cy•cli•zinePronunciation: (klôr-sī'klu-zēn", klōr-), [key] —n. Pharm. a substance, C18H21ClN2, used as an antihistamine in the symptomatic treatment of certain allergic disorders and in motion sickness. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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