What does nomenclature mean?
Nomenclature is a structured system of names or terms used to identify, classify, and discuss the objects, concepts, or categories belonging to a particular field. In biology, for example, binomial nomenclature gives organisms a two-part scientific name; in chemistry and law, specialized nomenclature similarly provides consistent labels for classes of substances or legal entities. The word can also refer more generally to the terminology of a subject: medical nomenclature, for instance, is the vocabulary used to describe diseases, symptoms, and treatments. Its characteristic implication is order rather than merely naming. Nomenclature suggests that names have been deliberately organized so that people can communicate precisely and efficiently. The term is therefore especially useful in scientific, academic, legal, and technical writing, where consistent terminology supports classification and avoids ambiguity.
A system of names or terms used to classify and identify things, especially in a scientific, technical, legal, or academic field.
"International standards establish a common nomenclature for chemical substances."
This is the dominant technical sense. It often emphasizes an organized classification or set of conventions.
The names or terminology collectively used within a particular field or subject.
"The text is difficult because its nomenclature assumes specialized knowledge."
In this sense, nomenclature can refer to the vocabulary of a discipline rather than to the complete naming system itself.
Usually used in the singular because it names a field's system of terms; the plural is possible when referring to several distinct systems.
"The two archives use different nomenclatures for the same collection."
Nomenclature is the map that turns a field's scattered objects and ideas into a system we can navigate.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of nomenclature
Nomenclature comes through Latin from Greek roots associated with naming: Greek onoma, meaning "name," and a form of kalein, meaning "to call." The Latin nomenclatura was formed from nomen, "name," and calare, "to call," and originally referred to a name or designation; the sense of a systematic body of names developed later. Cognates in English include nominal, nominate, and renounce, which reflect the same wider Latin root associated with naming.
Related word forms
How nomenclature is actually used
The word is most common in academic, scientific, technical, legal, and administrative contexts. It is more formal than the everyday expression "names" and can suggest deliberate classification or standardization.
Easily confused with nomenclature
Nomenclature emphasizes the organized system of names used in a field, whereas terminology more generally means the terms and vocabulary associated with it.