IPA: /ˈnoʊ.mənˌkleɪ.tər/
KK: /ˈnoʊmənˌkleɪtər/
A person or book that assigns names to things, especially in scientific classification or lists of words.
The nomenclator provided the official names for all the species in the study.
Nomenclator → It is formed from "nomen" (meaning name) and "calare" (meaning to call). The word refers to a person who calls out names or a list of names, often used in the context of naming or classification.
Think of someone who 'calls' out 'names' — that's what a nomenclator does.