toponymy in British English
(təˈpɒnɪmɪ) or toponymics (ˌtɒpəˈnɪmɪks)
noun1. the study of place names
2. rare the anatomical nomenclature of bodily regions, as distinguished from that of specific organs or structures
Derived forms
toponymic (ˌtopoˈnymic) or toponymical (ˌtopoˈnymical) or toponymal (ˌtopoˈnymal) adjective