lexicon

n. [ Gr. lexiko`n (sc. bibli`on), neut. of lexiko`s of or belonging to words, fr. le`xis a speaking, speech, a way of speaking, a single word or phrase, fr. le`gein to say, to speak. See Legend. ] A vocabulary, or book containing an alphabetical arrangement of the words in a language or of a considerable number of them, with the definition of each; a dictionary; especially, a dictionary of the Greek, Hebrew, or Latin language. [ 1913 Webster ]