Syenite
Pronunciation : Sy"e*nite
Part of Speech : n.
Etymology : [L. Syenites (sc. lapis), from Syene, Gr. (Min.) (a) Orig., a rock composed of quartz, hornblende, and feldspar, anciently quarried at Syene, in Upper Egypt, and now called granite. (b) A granular, crystalline, ingeous rock composed of orthoclase and horn
Source : Webster's Unabridged Dictionary, 1913