quinoidine
noun
qui·noi·dine
kwə̇ˈnȯiˌdēn,
-dᵊn
variants or quinoidin
-dᵊn
plural -s
: a bitter brownish resinous mixture often molded into sticks of amorphous alkaloids obtained as a by-product in the extraction of cinchona bark for crystalline alkaloids and formerly used as a substitute for quinine
Word History
Etymology
International Scientific Vocabulary quin- + -oid + -ine or -in