no·men·cla·ture 
(nōmən-klā′chər, nō-mĕnklə-)
(nōmən-klā′chər, nō-mĕnklə-)n.
1. A system of names used in an art or science: the nomenclature of mineralogy.
2. The system or procedure of assigning names to groups of organisms as part of a taxonomic classification: the rules of nomenclature in botany.
[Latin nōmenclātūra, from nōmenclātor, nomenclator; see NOMENCLATOR.]
no′men·clatur·al adj.