• synonyms


[kwi-noi-deen, -din]
noun Pharmacology.
  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.
Show More

Origin of quinoidine

First recorded in 1835–45; quin(ine) + -oid + -ine2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for quinoidine

Historical Examples

  • From such liquors it is precipitated in an impure state by an alkali, and brought into commerce under the name of quinoidine.

    Cooley's Practical Receipts, Volume II

    Arnold Cooley

  • The quinoidine of commerce ought never to be used in medicine unless purified.

  • Dr de Vrij, for instance, found sometimes more than 20% of quinidine in some samples of quinoidine of commerce.

quinoidine in Medicine


(kwĭ-noidēn′, -dĭn)
  1. A brownish-black mixture of alkaloids remaining after extraction of crystalline alkaloids from cinchona bark, used as a quinine substitute.
Show More
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.