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单词 sphene
释义

WordReference Random House Unabridged Dictionary of American English © 2024
sphene (sfēn),USA pronunciation n. 
  1. Mineralogya mineral, calcium titanium silicate, CaTiSiO5, occurring as an accessory mineral in a variety of  crystalline  rocks,  usually  in  small  wedge-shaped  crystals. Also called titanite. 
  • Greek sphé̄n wedge
  • 1805–15

Collins Concise English Dictionary © HarperCollins Publishers::
sphene /sfiːn/ n
  1. a brown, yellow, green, or grey lustrous mineral consisting of calcium titanium silicate in monoclinic crystalline form. It occurs in metamorphic and acid igneous rocks and is used as a gemstone. Formula: CaTiSiO5
    Also called: titanite
Etymology: 19th Century: from French sphène, from Greek sphēn a wedge, alluding to its crystals
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更新时间：2025/7/31 4:35:09