The scientific naming of species whereby each species receives a Latin or Latinized name of two parts, the first indicating the genus and the second being the specific epithet. For example, Juglans regia is the English walnut; Juglans nigra, the black walnut.
- (biology, taxonomy) The scientific system of naming each species of organism with a Latinized name in two parts; the first is the genus, and is written with an initial capital letter; the second is some specific epithet that distinguishes the species within the genus. By convention, the whole name is typeset in italics. The genus part is often abbreviated to its initial letter e.g. H. sapiens for Homo sapiens