vanadium

n. (V) toxic silvery white metallic element used in strengthening steel (Chemistry)

Vanadium is a chemical element that has the symbol V and atomic number 23. A rare, soft and ductile element, vanadium naturally occurs in certain minerals and is used mainly to produce certain alloys. It is one of the 26 elements found in most living organisms.
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Vanadium /va·na·di·um/ a chemical element, at. no. 23, symbol V. Its salts have been used in treating various diseases. [more]Vanadium - Community and Resources

Noun
1. a soft silvery white toxic metallic element used in steel alloys; it occurs in several complex minerals including carnotite and vanadinite
(synonym) V, atomic number 23
(hypernym) metallic element, metal
(substance-holonym) carnotite

n. vanadium, rare chemical element used in strengthening steel