Syenite is one of the important type of rocks. If we have to define Syenite in general, Syenite is a coarse-grained igneous rock which is composed mainly of alkali feldspar and various ferromagnesian minerals. Syenite comes under Igneous Rocks. All Igneous Rocks have similar properties and formation process. Along with Syenite Definition, know more about the History of Syenite, Etymology of Syenite in next sections.