lexeme

noun

1. A lexical item corresponding to the set of all words (or of all multi-word expressions) that are semantically related through inflection of a particular shared basic form.

   “A lexeme is a unit of lexical meaning, which exists regardless of any inflectional endings it may have or the number of words it may contain. Thus, fibrillate, rain cats and dogs, and come in are all lexemes, as are elephant, jog, cholesterol, happiness, put up with, face the music, and hundreds of thousands of other meaningful items in English.”

   “In a typical lexicalist approach (e.g. Koontz-Garboden 2006), the unmarked lexeme is taken as lexically listed, even if its meaning (as it often does) includes templatic entailments, and the derivational morphology is taken to operate on the underived form to yield the derived form. This is the case not only morphologically, but also semantically.”

2. (broadly, metonymically)A lexical item corresponding to the set of all words (or of all multi-word expressions) that are semantically related through inflection of a particular shared basic form.
3. (broadly, metonymically)A lexical item corresponding to the set of all words (or of all multi-word expressions) that are semantically related through inflection of a particular shared basic form.
4. An individual instance of a continuous character sequence without spaces, used in lexical analysis.

   “Near-synonym: token”