lex·i·con /ˈlɛksəˌkɑn ||kən/
Lex·i·con n. 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.
n 1: a language user's knowledge of words [syn: vocabulary, mental
2: a reference book containing an alphabetical list of words
with information about them [syn: dictionary]