D defs.my
Entry 1 sense Webster, 1913

Sphene

· IPA /sfiːn/
01 n. 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.
  1. 1.
    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.(Min.)