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quinoidine

[ kwi-noi-deen, -din ]
/ kwɪˈnɔɪ din, -dɪn /
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noun Pharmacology.
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.
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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. 2023

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