Question

which is lexical word?

Answer 1

in lexicography, a lexical item (or lexical unit/ LU,lexical entry) is a single word, a part of a word, or a chain of words (= catena) that forms the basic elements of a language's lexicon (≈ vocabulary). Examples are cat, traffic light, take care of, by the way, and it's raining cats and dogs.

Answer 2

Lexical- relating to the word or vocabulary of a language.