The Lexeme reference article from the English Wikipedia on 24-Apr-2004
(provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Lexeme

Time you got around to sponsoring a child
A lexeme is a unit of linguistic analysis. It belongs to a particular syntactic category and has a particular meaning (semantic value). Lexemes may be simple words, phrasal and compound words and shortened forms. A lexicon consists of lexemes.

See also:

Lexicography