Definition of nomenclature noun from the Oxford Advanced Learner's Dictionary



BrE BrE//nəˈmenklətʃə(r)//
; NAmE NAmE//nəˈmenklətʃər//
, NAmE//ˈnoʊmənkleɪtʃər//
[uncountable, countable] (formal)
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a system of naming things, especially in a branch of science zoological nomenclature Word Origin early 17th cent.: from French, from Latin nomenclatura, from nomen ‘name’ + clatura ‘calling, summoning’ (from calare ‘to call’).
See the Oxford Advanced American Dictionary entry: nomenclature