noun
also to·pon·o·my təˈpänəmē, tōˈ-, -mi
( -es )
Etymology: toponymy International Scientific Vocabulary top- + -onymy; toponomy from top- + Greek onoma name + English -y — more at name
1. : the place-names of a region or language or the especially etymological study of them
2. : the nomenclature of regional anatomy