Sulpharsenic
Sulph`ar`sen´ic
| a. | 1. | (Chem.) Of, pertaining to, or designating, a hypothetical sulphacid (called also thioarsenic acid) analogous to arsenic acid, and known only in its salts. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.