noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The scientific study of the Moon.; The scientific study of the Moon’s movements in the heavens and the kinetic influences it has upon and it receives from other astronomical bodies. uncountable, usually
2. 2
   the branch of astronomy that deals with the moon wordnet
3. 3
   The scientific study of the Moon.; The scientific study of the formation and composition of the Moon’s crust. uncountable, usually

Etymology

From selen- (“moon”) + -o- + -logy (“study”).

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.