: a crystalline compound MoO3 made usually by roasting molybdenite or by heating ammonium molybdate and used chiefly in making other molybdenum compounds and metallic molybdenum and as a catalyst — called also molybdic oxide
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Chem.
a white, crystalline, sparingly water-soluble powder, MoO3, used chiefly in the manufacture of molybdenum compounds. Also called molybdic anhydride, molybdic oxide.
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molybdenum trioxide,
a yellowish white powder that is a compound of molybdenum and oxygen, used as a source material for preparation of molybdenum compounds and for increasing the adhesion of enamels for coating metals. Formula: MoO3
Useful english dictionary. 2012.