Lexicon is the term that refers to the vocabulary of a language
Vocabulary basically means the body of words that are being used in a particular language. For instance, in English language, the use of word such as boy, girl entails the language vocabulary
So, basically, Lexicon can be simply defined as a language's dictionary.
Lexicon entails set of names for things, events, ideas, dates and everything that can be discussed in language.
Therefore, the term which refers to vocabulary of a language or words contained within a language is known as Lexicon.
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