sphene

noun
\ˈsfēn \

Definition of sphene 

: a mineral that is a silicate of calcium and titanium and often contains other elements

First Known Use of sphene

1815, in the meaning defined above

History and Etymology for sphene

French sphène, from Greek sphēn wedge

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The first known use of sphene was in 1815

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Britannica.com: Encyclopedia article about sphene

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