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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.

tau·ton′y·mous (tô-tŏn′ə-məs) adj.
tau·ton′y·my n.


(Biology) biology a taxonomic name in which the generic and specific components are the same, as in Rattus rattus (black rat)
[C20: from Greek tautonymos. See tauto-, -onym]
ˌtautoˈnymic, tautonymous adj
tauˈtonymy n


(ˈtɔ tə nɪm)

a scientific name in which the generic and the specific names are the same, as Tyrannus tyrannus (the eastern kingbird).
[1895–1900; < Greek tautṓnymos of the same name =tauto- tauto- + -ōnymos named]
tau•ton′y•my, n.


a botanical or zoological name in which the two terms, the generic name and the specific, are the same (a practice no longer approved by the International Code of Botanical Nomenclature). — tautonymic, tautonymous, adj.
See also: Classification
a botanical or zoological name in which two terms are combined, the generic name and the specific, with both being the same. (a practice no longer approved by the International Code of Botanical Nomenclature.)
See also: Botany, Names
References in periodicals archive ?
As before, Noah turns away hyphenated words, coinages, palindromes, tautonyms and pair isograms.
Synonyms and Homonyms Meaning of Authors name in brackets The Law of Priority Rejection of names Names of hybrid Plants Tautonyms Nomen novum or Replacement name Preoccupied names BIOCODE THE TYPE AND ITS IMPORTANCE Kinds of Types Type designation CHAPTER 8--PUBLICATION KINDS OF PUBLICATIONS 1.
But there is a third variety as well: Words with an even number of letters which are decomposable into two-part tautonyms (e.
TAUTONYMIC PATTERNS The words themselves must not be tautonyms.
The first 10x10 word square, which appeared in 1921, was constructed entirely of tautonyms (words like TANGATANGA, which have two repeated five-letter parts) and so is not very satisfying.
Back to Susan's 15-169 article, her 'tautophones' as an alternative to 'nautonyms' fails because it also encompasses most true (letteral) tautonyms and doesn't indicate that nautonyms are not.
This story began over a year ago on page 106 of the May 2014 issue of Word Ways when Anil challenged me to find what he called NAUTONYMS, "sounded but not spelled tautonyms like RETREAT".
To my New Zealand ear," Jeff Grant writes, "words like DIDDY, KICKY, LILY, NINNY, PIPPY, SISSY and TITTY are not quite homophonic tautonyms.
They are correct, being phonetic tautonyms according to the Oxford English Dictionary's phonetics.
Numerical Tautonyms such as GULP (G + U = 28 and L + P also = 28) have appeared in previous issues of Word Ways.
However, I'm not familiar with any dialect that would pronounce Susan's several-y ending words (lily etc) as tautonyms.
SUSAN THORPE takes up Anil's challenge (May issue page 106) to produce more Nautonyms (sounded but not spelled tautonyms such as RETREAT) by offering ANNAN, COCOA, CUSCUSS (vf), DIDDY, ENSENSE, ENTENTE, KICKY, LILY, NINNY, PIPPY, SISSY, and TITTY.