Chlorous

1. a. Pertaining to, or resembling, the electro-negative character of chlorine; hence, electro-negative; — opposed to basylous or zincous.
2. a. Of, 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.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.