Metantimonic
Met`an*ti*mon"ic\, a. [Pref. met- + antimonic.] (Chem.) (a) Pertaining to, or designating, an acid (formerly called antimonic acid) analogous to metaphosphoric acid, and obtained as a white amorphous insoluble substance, (HSbO3). (b) Formerly, designating an acid, which is now properly called pyroantimonic acid, and analogous to pyrophosphoric acid.