[F. CHINA3 (= quinine) + -OID + -INE.] A resinous substance, contained in the refuse of quinine.
1875. H. C. Wood, Therap. (1879), 79. Under the name of chinoidine is sold by the manufacturers the black, intensely bitter residue left upon the evaporation of the mother-liquor after the crystallization of the alkaloids out of it.
1883–4. Med. Ann., 35/1. The chinoidin has a similar action to quinine.
