metantimonic

Century Dictionary and Cyclopedia

1. Noting an acid, HSbO₃, obtained by heating ortho-antimonic acid to 175° C. The metantimonic acid of Frémy (H₄Sb₂O₇) is now called pyro-antimonic acid, thus preserving analogy with the different phosphoric acids.

GNU Webster's 1913

1. adj. Pertaining to, or designating, an acid (formerly called antimonic acid) analogous to metaphosphoric acid, and obtained as a white amorphous insoluble substance, (HSbO3).
2. adj. Formerly, designating an acid, which is now properly called pyroantimonic acid, and analogous to pyrophosphoric acid.