no·​men·​cla·​tor | \ ˈnō-mən-ˌklā-tər How to pronounce nomenclator (audio) \

Definition of nomenclator

1 : a book containing collections or lists of words
2 archaic : one who announces the names of guests or of persons generally
3 : one who gives names to or invents names for things

First Known Use of nomenclator

1585, in the meaning defined at sense 1

History and Etymology for nomenclator

borrowed from New Latin nōmenclātor "book containing lists of names or words," going back to Latin nōmenclātor, nōmenculātor "slave tasked with telling his master the names of clients and others encountered publicly," from nōmen "name" + calāre "to announce, proclaim, summon" + -tor, agent suffix — more at name entry 1, low entry 1

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The first known use of nomenclator was in 1585

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