D defs.my
Entry 1 sense Webster, 1913

Sulpharsenious

· Sulph·ar·se·ni·ous · IPA
01 a. Of, pertaining to, or designating, a hypothetical sulphacid (called also thioarsenious acid) analogous to arsenious acid, and known only in…
  1. 1.
    Of, pertaining to, or designating, a hypothetical sulphacid (called also thioarsenious acid) analogous to arsenious acid, and known only in its salts.(Chem.)