Lexicon

A lexicon is a list of words together with additional information, i.e. a dictionary.

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In linguistics, a lexicon has a slightly more specialized definition, as it includes the lexemes used to actualize words. Lexemes are formed according to morpho-syntactic rules and express sememes.

A lexicon may also be the mental vocabulary in a speaker's mind.

Furthermore an indivividual lexical knowledge is a term used in academia to refer to an individual's vocabulary knowledge.