cincho-Chem.|ˈsɪŋkəʊ|Combining form of cinchona, as in cinchocerotic, cincho-cerotin, cincho-meronic, cincho-phen, cincho-tannic, cincho-toxin(e, cincho-vatin (f. the species Cinchona ovata).1857Miller Elem.Chem., Org. 276 Aricine or cincho⁓vatine.1875Jrnl.Chem.Soc. XXVIII. 89 Cinchomeronic acid crystallises anhydrous; its calcium salt is (C11H5N2O6)2Ca3 . 10 H2O.1878Ibid. XXXIV. 157 This base is oxidised by permanganate to formic acid and cinchotenine—C19N22N2O + O4= C18H20N2O3 + CH2O2.1884Ibid. XLVI. 332 Cinchocerotic acid, C10H22O2.Ibid., Cinchocerotin..had been deposited in copper tubes through which hot alcohol was passed after having exhausted a mixture of calcium hydroxide and South American calisaya bark.1886Encycl.Brit. XX. 184/2 The alkaloids appear to exist in cinchona bark chiefly in combination with cinchotannic and quinic acids.1895Jrnl.Chem.Soc. LXVIII. i. 434 The oily compound previously obtained by the action of dilute acetic acid on cinchonine..is termed cinchotoxine, C19H22N2O.1907Jrnl.Chem.Soc. XCII. i. 634 Nitrosoquinotoxine and the sulphonamide of cinchotoxine are not decomposed by sodium ethoxide and nitrobenzene.1944Hackh's Chem.Dict. (ed. 3) 202/2 Cinchophen, atophan.1958Chambers's Techn.Dict. 966/1 Cincophen, Quinophan, or 2-phenylquinoline-4-carboxylic acid.