Titanium \Ti*ta"ni*um\, n. [NL., fr. L. Titani or Titanes, Gr. ?, the sons of the earth.]

(Chem.) An elementary substance found combined in the minerals manaccanite, rutile, sphene, etc., and isolated as an infusible iron-gray amorphous powder, having a metallic luster. It burns when heated in the air. Symbol Ti. Atomic weight 48.1.

Source: Webster's Revised Unabridged Dictionary (1913)