Dictionaries & Thesauri

English Language Dictionaries

• American Heritage Dictionary of the English Language
  This is the 4th edition published in 2000.  It contains over 90,000 entries and 70,000 audio word pronunciations plus 900 full-page color illustrations.
• OneLook Dictionaries
  Searches more than 80 general and specialized English language dictionaries on the Internet simultaneously.  Also permits searches within sub-categories of dictionaries.
• OneLook Reverse Dictionary
  You enter the meaning and it finds words for it.
• Oxford English Dictionary
  This famous dictionary provides the history of the meaning of words, illustrated by quotations.
• Webster's Revised Unabridged Dictionary
  The full text of the 1913 edition published by G. & C. Merriam (edited by Noah Porter), searchable by headwords only, with hypertext-linked cross references.

Non-English Language Dictionaries

• French-English/English-French
• German-English/English-German
• Italian-English/English-Italian
• Portuguese-English/English-Portuguese
• Russian-English/English-Russian
• Spanish-English/English-Spanish

Acronym Dictionaries and Guides

• Acronyma
  Find acronyms not only in English but in several European languages.
• Acronym Finder
  Contains more than 4 million acronyms and abbreviations.
• Internet Acronym Server
  Find acronyms used in all fields.

Specialized Dictionaries for Science, Slang, Art, and the Net

• AccessScience Dictionary
  This is a free version of the McGraw Hill Dictionary of Scientific and Technical Terms.
• Computer Knowledge: Definitions/Acronyms/Abbreviations
  A guide to the arcane terminology of the computer world.
• Dictionary of Slang
  British in origin, this dictionary also contains slang terms from outside the United Kingdom.
• Getty Art and Architecture Thesaurus On Line
  Find terms used in art, architecture, decorative arts, material culture.
• NetLingo
  Contains thousands of popular Internet words and definitions that describe the technology and community of the World Wide Web.

Thesauri

• Phrase Finder
  This is a thesaurus and dictionary for phrases.
• Roget's Thesaurus
  Permits searching of the headwords or full text of the 1911 edition (supplemented 1991).
• WordNet
  An "online lexical reference system" that organizes English nouns, verbs, adjectives, and adverbs into synonym sets.  On the opening page click on "Use WordNet online."
• Wordsmyth: The Educational Dictionary-Thesaurus
  A spell-like button allows you to find words, even if you don't know the exact spelling.   Includes an advanced search screen.

Lists of Dictionaries

• Terminology Collection: Online Dictionaries
  Lists both general dictionaries and glossaries for specialized fields and topics.
• YourDictionary.com
  A comprehensive list of dictionaries in numerous languages, plus thesauri, grammars, etc.  Provides translations from English into other languages.
• Dictionary Link
  Clearly organized compilation of online language sites.

Search Aids and Bibliographic Tips

• Search the Internet
  Want more? Here you'll find a collection of search engines, indexes and directories.
• Internet Resources Citation Guides
  Learn how to cite information found on the Net in a bibliography.
• Evaluating Information Sources
• Writer's Handbook
  Produced by the Writing Center at UW-Madison. Contains tips on style, grammar, punctuation, and citing sources.
• Research and Documentation Online
  Information on finding and documenting sources in the humanities, social sciences, history, and the sciences.