syenite

noun sy·e·nite \ˈsī-ə-ˌnīt\

Definition of SYENITE

: an igneous rock composed chiefly of feldspar

— sy·e·nit·ic \ˌsī-ə-ˈni-tik\ adjective

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Latin Syenites (lapis) stone of Syene, from Syene, ancient city in Egyptian

First Known Use: circa 1796

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