IPA: /ˈlɛksɪkən/
KK: /ˈlɛksɪkən/
A collection of words and their meanings in a language, or a specific set of terms used in a particular field or subject.
The lexicon of medical terminology can be quite complex for new students.
Lexicon → It is derived from the Greek word "lexikon" (meaning dictionary or wordbook), which comes from "lexis" (meaning word or speech). The term refers to a collection of words or vocabulary of a language.
Think of a 'wordbook' ('lexikon') that contains all the 'words' ('lexis') of a language — that's what a lexicon is.