arsenious Meaning, Definition & Usage

  1. adjective relating to compounds in which arsenic is trivalent

WordNet

Ar*se"ni*ous adjective
Etymology
Cf. F. arsénieux.
Definitions
  1. Pertaining to, consisting of, or containing, arsenic; as, arsenious powder or glass.
  2. (Chem.) Pertaining to, or derived from, arsenic, when having an equivalence next lower than the highest; as, arsenious acid.

Webster 1913