• lexemeA fundamental unit of the vocabulary of a language.
  • lexical databaseA database containing terms as well as information about the terms such as part of speech, type of term, etc.
  • lexicographerA person who is knowledgeable about terms, their uses, parts of speech, etc. Lexicographers often construct controlled vocabularies.
  • literary warrantJustification for the representation of a concept in an indexing language or for the selection of a preferred term because of its frequent occurrence in the literature. See also organizational warrant and user warrant.