1911 Encyclopædia Britannica/Lexicon

LEXICON, a dictionary (q.v.). The word is the Latinized form of Gr. λεξικόν, sc. βιβλίον, a word-book (λέξις, word, λέγειν, to speak). Lexicon, rather than dictionary, is used of word-books of the Greek language, and sometimes of Arabic and Hebrew.