• (a.) Pertaining to, or derived from, antimony; -- said of those compounds of antimony in which this element has an equivalence next lower than the highest; as, antimonious acid. Found on http://thinkexist.com/dictionary/meaning/antimonious/
An`ti·mo'ni·ous adjective (Chemistry) Pertaining to, or derived from, antimony; -- said of those compounds of antimony in which this element has an equivalence next lower than the highest; as, antimonious acid. Found on http://www.encyclo.co.uk/webster/A/96