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The word thesaurus is New Latin for treasure; coined in the early 1820's. Besides its meaning as a treasury or storehouse, it more commonly means a listing of words that are related by similar meanings. For example, a book of jargon for a specialized field; or more generally a list of subject headings and cross-references used in the filing and retrieval of documents.

In Information Technology, a thesaurus represents a database or list of semantically orthogonal topical search keys. In the field of Artificial Intelligence, a thesaurus may sometimes be referred to as an ontology.


  • Thesaurus of English Words & Phrases (ed. P. Roget); ISBN: 0062720376
  • Webster's New World Thesaurus (ed. C. Laird); ISBN: 0671519832
  • Oxford American Desk Thesaurus (ed. C. Lindberg); ISBN: 0195126742
  • Evaluation Thesaurus (by. M. Scriven); ISBN:0803943644
  • Great Song Thesaurus (by R. Lax & F. Smith); ISBN:0195054083
  • Thesaurus of Psychological Index Terms (APA); ISBN: 1557987750
  • Clinician's Thesaurus, (by E.Zuckerman); ISBN:157230569X
  • Thesaurus Musicarum Italicarum, (Utrecht U.);
  •, (Lexico, Inc.);
  • Cyc Knowledge Base, (Cycorp, Inc.);

See also Dictionary