lexicon

/ˈlɛksɪkɑn/
noun
  1. The vocabulary of a person, language, or branch of knowledge.
    • The lexicon of medicine includes many terms from Latin and Greek.
    • Children acquire a large lexicon of words by the time they start school.
    • Reading widely helps expand your personal lexicon.
  2. A dictionary or word list, especially of a particular subject or language.
    • The website offers a searchable lexicon of slang from around the world.
    • She consulted a lexicon of legal terms to understand the contract.
    • The ancient Greek lexicon contains thousands of entries for classical texts.
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