Definitions

1. adjective

Relating to or denoting syenite, a type of igneous rock.

“The geologist noted the syenitic outcroppings in the nearby hills.”

2. adjective

Relating to or resembling syenite in composition or structure.

“The geologist studied the syenitic rocks formed as a result of volcanic activity.”

3. noun

A type of igneous rock, typically composed of alkali feldspar and quartz.

“The geologist’s sample was a syenitic rock from the nearby quarry.”