Toponymy Definition
 tə-pŏnə-mē 
    noun
  
 The place names of a region or language.
 American Heritage 
The place names of a country, district, etc., or the study of these.
 Webster's New World 
The nomenclature of the regions of the body.
 Webster's New World 
Synonyms: 
  - toponomy
 
Origin of Toponymy
From topo- +"Ž -nomy.
From Wiktionary
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