cinch-|sɪŋk|var. cincho- used before vowels, as in cinchaine, cinchamidine, cinchene, cincholine(seequots.).1881Jrnl.Chem.Soc. XL. 1045 Cinchamidine, C20H26N2O, a new alkaloid found in the aqueous mother-liquors from the purification of homocinchonidine sulphate, is obtained by the addition of ammonia to this liquid.1882Ibid. XLII. 225 Nitrous acid has no action on cinchene.Ibid. 1114 Cincholine is prepared from the first mother-liquor obtained in the manufacture of quinine sulphate.Ibid., Cincholine is a pale-yellow oil, lighter than water.1890Billings Med.Dict. I. 281/1 Cinchene, C19H20N2, a crystallizable, volatile base obtained by partial decomposition of cinchonine.1906Watts' Dict.Chem. II. 178/2 Cinchamidine..occurs in the mother-liquors from homocinchonidine.1944Hackh's Chem.Dict. (ed. 3) 201/2 Cinchaine, C22H30O2N2..a cinchona alkaloid used as anesthetic.Ibid., Cinchene, C19H20N2..an alkaloid obtained from cinchonine by boiling with alcoholic KOH.Ibid., Cincholine, an alkaloid from cinchona bark.