Sphene

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Sphene \Sphene\, n. [F. sph[`e]ne, fr. Gr. sfh`n a wedge.]
     (Min.)
     A mineral found usually in thin, wedge-shaped crystals of a
     yellow or green to black color. It is a silicate of titanium
     and calcium; titanite.
     [1913 Webster]