tautonym Syllabification: (tau·to·nym)Pronunciation: /ˈtôtəˌnim/Definition of tautonym noun Botany & Zoology a scientific name in which the same word is used for both genus and species, for example Vulpes vulpes (the red fox). Linguistics a word that designates different objects or concepts in different dialects (e.g., corn is wheat in England and oats in Scotland). Derivatives tautonymyPronunciation: /tôˈtänəmē/ noun tautonym in other Oxford dictionaries Definition of tautonym in the British & World English dictionary