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Meaning of quinoidine

qui•noi•dine

Pronunciation: (kwi-noi'dēn, -din), [key]
— n. Pharm.
  1. a brownish-black, resinous substance consisting of a mixture of alkaloids, obtained as a by-product in the manufacture of quinine and formerly used as a cheap substitute for it.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.