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Definition of Syenite
1. n. Orig., a rock composed of quartz, hornblende, and feldspar, anciently quarried at Syene, in Upper Egypt, and now called granite.
Definition of Syenite
1. Noun. (geology) An igneous rock composed of feldspar and hornblende ¹
¹ Source: wiktionary.com
Definition of Syenite
1. an igneous rock [n -S] : SYENITIC [adj]