'Chromous acid' definitions:

Definition of 'Chromous acid'

From: GCIDE

Chromous \Chro"mous\, a. Of, pertaining to, or derived from, chromium, when this element has a valence lower than that in chromic compounds. [1913 Webster]
Chromous acid, a bluish gray powder, CrO.OH, of weak acid properties and regard as an acid. [1913 Webster]