Dictionaries and Thesauri

GENERAL

• AbbreviationZ  A to Z of acronyms and abbreviations on the Net
• Acronyma Search engine for acronyms and abbreviations, including six foreign languages
• Acronym Finder
• Acronym Server
• American Heritage Dictionary of Idioms In Xreferplus browse for language
• American Heritage Dictionary of the English Language
• Bartleby.com Includes dictionaries and thesauri and other reference tools
• Bloomsbury Dictionary of Contemporary Slang In Xreferplus browse for language
• Cambridge Dictionaries Includes the Cambridge Dictionary of American English, Cambridge Advanced Learner's Dictionary, Cambridge International Dictionary of Phrasal Verbs, and the Cambridge International Dictionary of Idioms
• Cliche Finder
• Credo Reference Formerly XreferPlus provides full text general and specialized encyclopedias and dictionaries
• Devil's Dictionary In Xreferplus browse for language
• Dictionary.net Returns definitions from a variety of sources at once
• Dictionary of Eponyms In Xreferplus browse for language
• Dictionary of Sound-Alike Words Provides words and definitions
• The Free Dictionary Returns definitions from a variety of sources, some not free.
• Foreign Language dictionaries University Library Subject Guide
• The Glossarist: A Searchable Glossary Directory Comprehensive directory of thousands of glossaries available on the WWW
• Heinle's Newbury House Dictionary of American English
• Infoplease Encyclopedia and Dictionary
• LookWAYup English dictionary with an integrated thesaurus and some translation capability
• OED Online Oxford English Dictionary
• One Look Dictionaries
• Online Slang Dictionary: a collaborative project
• Penguin's Rhyming Dictionary In Xreferplus browse for language
• Rawson's Dictionary of Euphemisms and Other Doubletalk In Xreferplus browse for language
• Rawson's Wicked Words In Xreferplus browse for language
• Roget's II: The New Thesaurus
• Roget's Thesaurus
• Rhymezone Rhyming Dictionary
• Slang Dictionaries on Yahoo!
• Slang Dictionary
• Strange and Unusual Dictionaries
• Synonym Dictionary
• Visual Dictionary Online From Merriam-Webster, access to over 6,000 images
• Your Dictionary.com

SPECIALIZED DICTIONARIES BY CATEGORY

Art

• Animation Art Glossary
• Art and Architecture Thesaurus
• Art and Design Dictionary from The Digital Artist
• Artist Dictionary/Biographies From About.com
• ArtLex, a lexicon of visual art terminology
• Artwow.com Online Artist Dictionary  Glossary of art terms, words and concepts
• Biographical Dictionary of Artists In Credo Reference browse for Art
• Bloomsbury Guide to Art In Xreferplus browse for Art
• Glass Art Dictionary, Terms and Phrases
• Glossary of Graphic Design and Web Page Design Terms
• Glossary of Imaging Terms
• Glossary of Medieval Art and Architecture
• Glossary of Painting Styles From the Web Museum, Paris
• Graphic Design and Printing Terminology
• Grove Dictionary of Art
• Illustrated Dictionary of Jewelry
• InfoPlease Glossary of Art Movements
• Logo Design and Graphic Design Glossary
• Symbols.Com Over 2,600 graphic symbols
• Thames & Hudson Dictionary of 20th Century Architecture In Credo Reference browse for Art
• Thames & Hudson Dictionary of 20th Century Design and Designers In Credo Reference browse for Art
• Thames & Hudson Dictionary of Art Terms In Credo Reference browse for Art
• Thames & Hudson Dictionary of Art and Artists In Credo Reference browse for Art
• Thames & Hudson Dictionary of British Art InCredo Reference browse for Art
• Thames & Hudson Dictionary of Fashion and Fashion Designers In Credo Reference browse for Art t
• Thames & Hudson Dictionary of Dictionary of Graphic Design and Designers In Credo Reference browse for Art

• Watercolor Glossary

Business

• Business, the Ultimate Resource: Dictionary of Business and Management  In Credo Reference browse for Business
• Business Week Online Glossary
• Comprehensive Financial Glossary
• Dictionary of Hotels, Tourism and Catering Management In Credo Reference browse for Business
• Dictionary of Human Resources & Personnel Management In XCredo Reference browse for Business
• Dictionary of Occupational Titles
• Dictionary of Printing and Publishing In Credo Reference browse for Business
• Electronic Commerce Dictionary
• Glossary Basic Concepts of Quality from American Society for Quality
• Glossary of Financial and Business Terms Includes over 2,500 terms
• Harvey's Hypertextual Finance Glossary
• International Trade Terms
• Investor Words
• PACIFIC Dictionary of International Trade and Business
• Power of Knowledge, Real estate resource
• Retail Glossary of Terminology From About.com
• Standard Industrial Classification Index
• TQM Definitions
• Tradeport Glossary International trade and shipping terms
• Travel Industry Dictionary

Clothing and Textiles

• Apparel Search Glossary
• Clothing and Fashion Industry Terms
• Dye & Dyeing Industry Terms
• Fabric & Textiles Industry Terms
• Fabric Identification
• Fashion Glossary
• Fibers and Fiber Industry Terms
• Footwear Glossary
• Hat & Headwear Definitions
• Label Definitions
• Miscellaneous Apparel Industry Terms
• RFID Terms & Definitions for the Clothing & Fashion industry
• Sewing Terms & Definitions
• Textile Dictionary
• Thames & Hudson Dictionary of Fashion and Fashion Designers  In Credo Reference  browse for Business
• Yarns & Yarn Industry Definitions

Computers and Software

• Compact American Dictionary of Computer Words In Credo Reference browse for technology
• Computer and Internet Glossary
• Computer High Tech Dictionary From Computer User
• Computing Dictionary from the Free Dictionary
• Dictionary of Communications Technology Wiley In Credo Reference browse for technology
• Free On-line Dictionary of Computing (FOLDOC)
• Internetworking Terms and Acronyms
• Hargrave's Communications Dictionary In Credo Reference browse for technology
• NetLingo Internet, online world of business, technology and communication
• Newnes Dictionary of Electronics In Credo Reference browse for technology
• Techdictionary
• TECHtionary Animated technical dictionary on internet, telecommunications, computer terms, acronyms, emoticons or smilies, chat abbreviations, filename extensions, HTML tags, and domain suffixes
• Web Design Terms and Definitions
• Web Dictionary of Cybernetics and Systems
• Web Hosting Glossary
• Webster's New World Computer Dictionary In Credo Reference browse for technology
• Webopedia
• What Is Computer dictionary

Education

• Dictionary: For Parents of Children with Disabilities From the University of South Dakota
• Glossary of Education Terms and Acronyms From the North Central Regional Educational Laboratory
• Glossary of Gifted Education
• Glossary of Learning Disabilities Terms
• Glossary of Instructional Strategies
• Glossary of Special Ed Terms From the Council for Disability Rights
• Glossary of United States Educational Terminology
• Learning and Performance Glossary
• Lexicon of Learning from the Association of Supervision and Curriculum Development

Food and Nutrition

• Asian Culinary Glossary of Ingredients and Cooking Terms
• Baking Terms
• Beer Lexicon
• Benders' Dictionary of Food and Cooking In Credo Reference browse for food
• Biotechnology and Food Glossary  From the UW Biotechnology Center
• Cooking Dictionary From the Reynolds Kitchens
• Cook's Thesaurus
• Dictionary of Cooking
• Epicurious Food Dictionary
• Epicurious Wine Dictionary
• Beer and Brewing Terminology
• Glossary of Coffee Terminology
• Glossary of Food Safety Terms
• International Dictionary of Food and Cooking In Credo Reference browse for food
• The "Living, audio" Wine Dictionary
• Natural Food Dictionary
• Nutrition Dictionary
• Oddbins Dictionary of Wine In Credo Reference browse for food
• Spirits Glossary of Terms
• Sushi Glossary
• Tea Glossary
• World Recipes Cooking Glossary Includes recipes

Humanities

• Andromeda Encyclopedic Dictionary of World History In Credo Reference browse for history
• Behind the Name
• Brewer's Dictionary of Phrase and Fable
• Dictionary of Contemporary History-1945 to the present  In Credo Reference browse for history
• Dictionary of Philosophical Terms and Names
• Dictionary of the History of Ideas
• Glossary of Literacy Terms
• Glossary of Poetic Terms
• Glossary of the Humanities
• Glossary of World Cultures
• Great American History Fact-Finder In Credo Referencebrowse for history
• Grove Dictionary of Music and Musicians
• New Dictionary of Cultural Literacy In Credo Reference browse for history
• Urban Dictionary Slang

Language - Translating

• Browser's Dictionary of Foreign Words and Phrases In Credo Reference browse for language
• Dictionary of Foreign Phrases and Abbreviations In Credo Reference browse for language
• Yourdictionary.com WWW links to over 400 dictionaries in 130 different languages

Law and Legislative

• Constitutional Dictionary From the United States Constitution Online
• Dictionary of Conflict Resolution In Credo Reference browse for law
• Divorce Source Dictionary
• Duhaime's Law Dictionary
• Everybody's Legal Dictionary From Nolo.com
• FindLaw Legal Dictionary
• Glossary of Family Law Terms from Divorcelawinfo.com
• BioPharmaceutical Intellectual Property and Legal Glossary from Cambridge Healthtect Institute.  Free but must register.
• Law.Com Dictionary
• LawInfo Legal Dictionary
• 'Lectric Law Lexicon
• Legislative Indexing Vocabulary Thesaurus of over 5,000 authorized terms used for searching the Thomas Bill Summary and Status files and the library of Congress Federal legislation files
• Merriam Webster's Dictionary of Law In Credo Reference browse for law
• Trademark Law Glossary
• Webster's Dictionary of Legal, Lawful & Propaganda Terms
• World of Criminal Justice In Credo Reference browse for law

Medicine, Health, and Psychology

• Association of Cancer Online Resources Cancer Dictionary Includes over 6,830 terms
• Complementary and Alternative Medicine (CAM) Glossary of Terms
• Dictionary of Common Medical Terms From the American Academy of Family Physicians
• Dictionary of Medical Acronyms and Abbreviations In Credo Reference browse for medicine
• Dictionary of Psychology
• Dorland's Illustrated Medical Dictionary In Credo Reference browse for medicine
• Types of Psychotherapy
• International Dictionary of Homeopathy In Credo Reference browse for medicine
• Macmillan Dictionary of Toxicology In Credo Reference browse for medicine
• MedTerms.com Medical dictionary
• Medical Dictionary From the National Library of Medicine
• MedlinePlus Includes HealthTopics which covers conditions, diseases and wellness in easy to understand terminology.
• Merriam-Webster Medical Desk Dictionary In EBSCO's Health Source Consumer and Health Source Nursing/Academic databases Click on the Medical Dictionary button
• Mosby's Dental Dictionary In Credo Reference browse for medicine
• Mosby"s Medical, Nursing and Allied Health Dictionary In Credo Reference browse for medicine
• Multilingual Glossary of Technical and Popular Medical Terms in Nine European Languages
• Online Dictionary of Mental Health
• Personality Glossary
• PharmInfoNet Glossary
• Psychology Dictionary
• Saunder's Comprehensive Veterinary Dictionary In Xreferplus browse for medicine
• Stedman's Medical Dictionary from American Heritage In Credo Reference browse for medicine
• Taber's Cyclopedic Medical Dictionary In Credo Reference browse for medicine
• University of Alberta's Cognitive Science Dictionary

Photography

• Digital Photography Glossary
• Digital Photography Review Glossary
• Glossary of Photographic Terms

Sciences

• Academic Press Dictionary of Science and Technology In Credo Reference browse for science
• AcquaText   An aquaculture dictionary
• BioGlossary From EverythingBio
• BioTech's Life Science Dictionary
• Chemistry Dictionary
• Collins Dictionary of Astronomy In Credo Reference browse for science
• Dictionary of Developmental Biology and Embryology In Credo Reference browse for science
• Dictionary of Units
• Dictionary of Units of Measurements
• Dictionary of Veterinary Terms
• GeoMan's Glossary of Earth Science Terms
• Glossaries of Genome/Human Genetics Terms
• Glossary of Environmental Terms From the Natural Resources Defense Council
• Glossary of  Physics Terms
• Glossary of Statistical Terms
• Illustrated Dictionary of Science In Credo Reference browse for science
• Life Science Glossary
• Macquarie Dictionary of Trees & Shrubs In Credo Reference browse for science
• Penguin Dictionary of Mathematics In Credo Reference browse for science
• Penguin Dictionary of Physics In Credo Reference browse for science
• Scientific and Technical Acronyms, Symbols, and Abbreviations
• Terms of Environment From the Environmental Protection Agency, defines in non-technical language the more commonly used environmental terms appearing in EPA publications
• Water Words Glossary North American Lake Management Society

Sign Language

• American Sign Language Browser: Online Video Clip Dictionary of ASL Signs
• Basic Dictionary of ASL Terms
• Handspeak Visual and animated sign language dictionary
• Sign Language From About.com; Provides a list of links

Social Sciences

• Adoption.com Large glossary of adoption terms
• Blackwell Dictionary of Political Science In Credo Reference browse for social sciences
• Glossary of Sociological Terms
• Internet Glossary of Statistical Terms
• Social Science Dictionary
• Sociology Dictionary
• Stepfamily Terminology From the Stepfamily Association of America
• U.S. Political Glossary

Technology

• Alliance for Telecommmunications Industry Telecom Glossary 2000  American National Standard T1.523-2001
• Barkley's OASIS Comprehensive Technology Glossary
• Construction Glossary
• Dictionary of Algorithms and Data Structures From the National Institute of Standards and Technology
• Glossary of Recycling Terms
• Glossary of Telecommunications Terms
• Home Glossary Construction and real estate terminology
• Netlingo Internet, online world of business, technology and communication
• Glossary of Construction Terms
• Show-Me Power Dictionary
• Technical Glossary
• TECHtionary Rich media animated source in technology that explains how technology works and its implications