'Toponomy' definitions:

Definition of 'toponomy'

From: WordNet
noun
The nomenclature of regional anatomy [syn: toponymy, toponomy]
noun
The branch of lexicology that studies the place names of a region or a language [syn: toponymy, toponomy]

Definition of 'Toponomy'

From: GCIDE
  • Toponomy \To*pon"o*my\, n. [Gr. ? place + ? to distribute.] The designation of position and direction. --B. G. Wilder. [1913 Webster]