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senior synonym (English)

Noun

In zoological_nomenclature, a name which describes the same taxon as one or more subsequently published names.

Usage notes

If two or more genera are formally designated and the type specimens are later assigned to the same genus, the first to be published (in chronological order) is the senior synonym, and all other instances are junior_synonyms.

Fullständig information på

http://en.wiktionary.org/wiki/senior synonym