Webster's English Dictionary

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nomenclature

no.men.cla.ture \'no--m*n-.kla--ch*r also no--'men-kl*-.chu.(*)r, -'men-,\ 
   n [L nomenclatura calling by name, list of names, fr. nomen + cala] 
   -kl*-ch*r, -kl*-.t(y)u.(*)rtus, pp. 1: NAME, DESIGNATION  2: the act or 
   process or an instance of naming  3a: a system or set of terms or symbols  
   3b: a system of terms used in a particular science, discipline, or art;  
   esp : the standardized New Latin names used in biology