The Collaborative International Dictionary
Syenitic
Syenitic \Sy`e*nit"ic\, a. [Written also sienitic.]
Relating to Syene; as, Syenitic inscriptions.
Relating to, or like, syenite; as, syenitic granite.
Wiktionary
syenitic
a. 1 Pertaining to, resembling or containing syenite 2 (rfv-sense) Pertaining to Syene (modern Aswan)