Learn how to say Lexises correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word lexis:
the total stock of words in a language.
the level of language consisting of vocabulary, as opposed to grammar or syntax:
the distinction between grammar and lexis
1950s (denoting the wording in a piece of writing): from Greek, literally ‘word’ (see lexicon)
Another word for vocabulary: all the words that are used in a language, or a dialect of a language.