Definition of nomen nudum in English:

nomen nudum

noun

  • A Latin name which was introduced without publication of an adequate description of the organism to which it was intended to be applied, or otherwise fails to conform to the appropriate code of biological nomenclature, and is therefore not available or valid as a result of that introduction. Occasionally: a vernacular name that cannot be attached to any species.

Origin

Late 19th century; earliest use found in American Naturalist. From scientific Latin nomen nudum from classical Latin nōmen + nūdum, neuter singular of nūdus.

Pronunciation

nomen nudum

/ˌnəʊmɛn ˈnjuːdəm/ /ˌnəʊmən ˈnjuːdəm/