ChlorousOf, pertaining to, or derived from, chlorine; -- said of those compounds of chlorine in which this element has a valence of three, the next lower than in chloric compounds; as, chlorous acid, HClO2
Chlorous(Chem. Physics) Pertaining to, or resembling, the electro-negative character of chlorine; hence, electro-negative; -- opposed to basylous or zincous.
Century Dictionary and Cyclopedia
chlorousPertaining to or containing chlorin; specifically, containing chlorin in larger proportion than chloric compounds: as, chlorous oxid; chlorous acid.