Definify.com

Webster 1913 Edition

Adj.

[Cf. F.

sélénieux

(Chem.)

Of, pertaining to, or containing, selenium; specifically, designating those compounds in which the element has a lower valence as contrasted with

selenic

compounds.

selenious ‎(comparative more selenious, superlative most selenious)

(inorganic chemistry) Of, pertaining to, or containing selenium, especially in a lower oxidation state than corresponding selenic compounds