Source : Webster's Revised Unabridged Dictionary (1913)

Chromium \Chro"mi*um\, n. [NL., fr. Gr. ? color.] (Chem.)
   A comparatively rare element occurring most abundantly in the
   mineral chromite. Atomic weight 52.5. Symbol Cr. When
   isolated it is a hard, brittle, grayish white metal, fusible
   with difficulty. Its chief commercial importance is for its
   compounds, as potassium chromate, lead chromate, etc., which
   are brilliantly colored and are used dyeing and calico
   printing. Called also {chrome}.

Source : WordNet®

chromium
     n : a hard brittle blue-white multivalent metallic element;
         resistant to corrosion and tarnishing [syn: {Cr}, {atomic
         number 24}]