syenite

An igneous rock composed primarily of alkali feldspar together with other minerals, such as hornblende.

In the quantitative system of classification (see rock), a proposed general field-term for a phaneric igneous rock composed of dominant feldspar of any kind, with subordinate amounts of mica, hornblende, pyroxene, or other minerals, and without a noticeable amount of quartz

A rock composed of feldspar and hornblende, with or without quartz.

Orig., a rock composed of quartz, hornblende, and feldspar, anciently quarried at Syene, in Upper Egypt, and now called granite.

A granular, crystalline, ingeous rock composed of orthoclase and hornblende, the latter often replaced or accompanied by pyroxene or mica. Syenite sometimes contains nephelite (elæolite) or leucite, and is then called nephelite (elæolite) syenite or leucite syenite.

granite

An igneous rock composed of feldspar and hornblende