noun Etymology: French sphène, from Greek sphēn wedge Date: 1815 a mineral that is a silicate of calcium and titanium and often contains other elements
SPHENE
Meaning of SPHENE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012