Webster's English Dictionary

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vanadium

Cross references:
  1. element               
 
va.na.di.um \v*-'na-d-e--*m\ n [NL, fr. ON Vanadi-s Freya] : a grayish 
   malleable ductile polyvalent metallic element found combined i n minerals 
   and used esp. to form alloys (as vanadium steel)