Chem. Obs. [f. TRIS- + NITRATE.] Old name for a nitrate supposed to contain three equivalents of basic oxide and one equivalent of nitric anhydride (then called nitric acid). Cf. TRIS- 2 a.
1836. Pharm. R. Coll. Physic., 217. Trisnitrate of Bismuth was formerly employed as a cosmetic under the name of magistery of Bismuth … represented to possess anti-spasmodic powers.
1850. Daubeny, Atom. The., iii. (ed. 2), 112. Trisnitrate of alumina [denotes] 1 of acid to 3 of the earth.
1876. Harley, Royle’s Mat. Med., 252. Trisnitrate of bismuth.
