nomenclator definition by Webster's New World
- a person, specif. a slave in ancient Rome, who announces the names of guests, etc.
- a person who invents names for, or assigns them to, things, as in scientific classification
Origin: Classical Latin ; from nomen, name plush calator, caller, crier ; from past participle of calare, to call: see clamor
nomenclator definition by American Heritage Dictionary
Origin: Latin nōmenclātor, a slave who accompanied his master to tell him the names of people he met, variant of nōmenculātor : nōmen, name; see nō̆-men- in Indo-European roots + calātor, servant, crier (from calāre, to call; see kelə-2 in Indo-European roots).