A chemical element (symbol Mo) with an atomic number of 42: a silvery metal, not found as a free element, used in steel alloys. / A single atom of this element.

plural of molybdenum

(chiefly Britain) Alternative spelling of molybdenum disulfide

(chemistry) a black, crystalline inorganic polymer of empirical formula MoS₂ that occurs as the mineral molybdenite and is used as a lubricant having a structure analogous to graphite

(inorganic chemistry) A complex oxide derived from a heteropoly acid of molybdenum and another element, typically phosphorus