Lexicon

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Lexicon

In its simplest form, a lexicon is the vocabulary of a person, language, or branch of knowledge. It is the catalog of words used often in conjunction with grammar, the set of rules for the use of those words. Items within a lexicon are called lexemes, and groups of lexemes are called lemmas, which are often the unit used for describing the size of a a lexicon. Additionally, a lexicon is divided into two main sections, open and closed categories. An open category is defined by lexemes that are more semantic in nature, like nouns and verbs, whereas a closed category is defined by syntactic lexemes, such as pronouns and determiners.

Source : DeepAI.org