molybdenum.
A chemical element (symbol Mo) with an atomic number of 42: a silvery metal, not found as a free element, used in steel alloys.
Meaning & usage
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.
a quadruple bond between molybdenums
Where this word comes from
From New Latin molybdaenum, from molybdaena (“any of various substances resembling lead”), from Ancient Greek μολύβδαινα (molúbdaina, “a plummet, piece of lead”), from μόλυβδος (mólubdos, “lead; graphite”), from an Anatolian word cognate with Lydian 𐤪𐤠𐤭𐤦𐤥𐤣𐤠 (mariwda, “dark”), from Proto-Indo-European *morkʷ-iyo-, from a root *morkʷ- (“dark”), cognate with English murk. Cf. Latin plumbum nigrum 'lead'. The suffix is + -um (“a chemical element”). Attested since the last quarter of 18th century.
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Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.