- Vanadium Va*na"di*um, n. [NL., fr. Icel. Vanad[=i]s, a surname of the Scandinavian goddess Freya.] (Chem.) A rare element of the nitrogen-phosphorus group, found combined, in vanadates, in certain minerals, and reduced as an infusible, grayish-white metallic powder. It is intermediate between the metals and the non-metals, having both basic and acid properties. Symbol V (or Vd, rarely). Atomic weight 50.94 (C12=12.000). [1913 Webster +PJC]
The Collaborative International Dictionary of English. 2000.