syenite noun. ['sʌɪǝnʌɪt] L18.
[from Latin syenites (lapis), (stone of) Syene, from Greek Suēnē Aswan, Egypt: see -ITE¹.]
Geology. A coarse-grained igneous rock, allied to granite, composed mainly of alkali feldspar, with hornblende, other ferromagnesian minerals, and accessory oxides.

■ syenitic [-'nɪtɪk] adjective containing or composed of syenite; having the character of syenite: L18.

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