The Collaborative International Dictionary
Geoselenic
Geoselenic \Ge`o*se*len"ic\, a. [Gr. ge`a, gh^, the earth + ? moon.] Pertaining to the earth and moon; belonging to the joint action or mutual relations of the earth and moon; as, geoselenic phenomena.
Wiktionary
geoselenic
a. Pertaining to the Earth and Moon.