kwə̇ˈnȯiˌdēn, -_d ə n noun
or qui·noi·din -_d ə n
( -s )
Etymology: International Scientific Vocabulary quin- + -oid + -ine or -in
: 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