from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A taxonomic designation, such as Gorilla gorilla, in which the genus and species names are the same, commonly used in zoology but no longer in botany.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A binomial name consisting of the same word twice, such as Bison bison.
from The Century Dictionary and Cyclopedia
- n. A name formed by repeating one word: as, kiwi-kiwi, the apteryx; taro-taro, the Orinoco bittern; awa-awa, the milk-fish of Hawaii; specifically, in zological and botanical nomenclature, a name in which the generic and specific names are the same: as, Scomber scomber, the mackerel; Cardinalis cardinalis, the cardinal redbird; Vulpes vulpes, the European red fox.
taut- + -onym (Wiktionary)