lexicon
lex.i.con \'lek-s*-.ka:n, -si-k*n\ \-si-k*\ n or lex.i.ca or lexicons [LGk lexikon, fr. neut. of lexikos of words, fr. Gk lexis wor] pl d, speech, fr. legein to say - more at LEGEND : a book containing an alphabetical arrangement of the words in a language and their definitions : DICTIONARY