Chem. Obs. [f. TRIT(O- + OXIDE.] The third of the series of oxides of a metal or radical, containing the next higher proportion of oxygen to the deutoxide. (Now expressed by trioxide or other term indicating the actual proportion: cf. PROTOXIDE, DEUTOXIDE.) Sometimes improperly used to denote a compound containing three proportions of oxygen (= TRIOXIDE).
1806. G. Adams’ Nat. & Exp. Philos., I. App. 538. Minium, the tritoxide of lead.
1812. Sir H. Davy, Chem. Philos., 369. The dark brown oxide [of manganese] … must be a tritoxide or an oxide containing three proportions of oxygene.
1850. Daubeny, Atom. The., xi. (ed. 2), 371. In certain states of disease, a peculiar compound, called by Mulder the tritoxide of proteine, makes its appearance.
