The Collaborative International Dictionary
Molybdous
Molybdous \Mo*lyb"dous\, a. [See Molybdena.] Of, pertaining to, or containing, molybdenum; specif., designating those compounds in which molybdenum has a lower valence as contrasted with molybdic compounds.
Wiktionary
molybdous
a. (context chemistry English) Of, pertaining to, or containing molybdenum; specifically designating those compounds in which molybdenum has a lower valence as contrasted with molybdic compounds.