Metantimonic

Met`an`ti`mon´ic

a.

1.

(Chem.) Pertaining to, or designating, an acid (formerly called antimonic acid) analogous to metaphosphoric acid, and obtained as a white amorphous insoluble substance, (HSbO3).

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.