Of the nature of, or containing, antimony. In Chem. applied to compounds of antimony in which it combines as a triad; as antimonious chloride Sb Cl3; antimonious acid, formerly applied to antimony tetroxide, afterwards to antimonious oxide or antimony trioxide Sb2O3.
ΚΠ
1833 Penny Cycl. I. 87/2 Acids, Acetic, Antimonic, Antimonious, etc.
1876 J. HarleyRoyle's Man. Materia Med. (ed. 6) 289 The antimonious oxyde sublimes with difficulty in needles.