Dictionaries
Acronym Finder
Contains more than 411,000 abbreviations and acronyms about computers, technology, telecommunications, and military acronyms and abbreviations.
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Art & Architecture Thesaurus Online
A database of terms and definitions for describing, indexing, and accessing information on the visual arts and architecture.
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ArtLex Art Dictionary
Provides definitions for more than 3,500 terms used in discussing visual culture, along with pictorial examples of art object images, arranged in chronological groups.
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Atmospheric Chemistry Glossary
Browsable glossary of terms covering air quality and atmospheric chemistry.
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Biomedical Acronym / Abbreviation Definition Database
Users can enter either an acronym or the full term and find out the acronym.
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Bookbinding and the Conservation of Books: A Dictionary of Descriptive Terminology
Contains thousands of terms and definitions which deal with the binding, care and repair of books.
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Britannica Online 
The complete encyclopedia, as well as Merriam-Webster's Collegiate Dictionary and the Britannica Book of the Year.
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Census Bureau Business Glossary
Provides definitions for commonly used business terms in United States Census Bureau publications and links.
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Chambers Reference Online
Search the Chambers 21st Century Dictionary, The Chambers Thesaurus (1996) or Chambers Biographical Dictionary (1997 edition with amendments).
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Comprehensive Aramaic Lexicon
Covers all dialects and periods of ancient Aramaic, one of the principal languages of antiquity, with a literature of central importance for history and civilization, and especially for the Jewish and Christian religions.
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Credo Reference : Dictionaries / Bilinguals 
Includes the full text of over 2 dozen reference sources, including encyclopedias, dictionaries, and thesauri covering a variety of subjects.
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Department of Defense Dictionary of Military and Associated Terms
Sets forth standard US military and associated terminology to encompass the joint activity of the Armed Forces of the United States in both US joint and allied joint operations, as well as to encompass the Department of Defense as a whole.
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Dictionary of Algorithms and Data Structures
Dictionary of algorithms, algorithmic techniques, data structures, archetypical problems, and related definitions.
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Dictionary of Ecological Epidemiology
Compiled by the University of Cambridge (UK) and contains linked cross-references within each definition.
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Dictionary of Maya Hieroglyphs
John Montgomery’s Dictionary of Maya Hieroglyphs is a reference to the hieroglyphic writing of the ancient Maya that presents over 1,200 hieroglyphs and glyph compounds.
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Dictionary of Philosophical Terms and Names
A concise guide to technical terms and personal names often encountered in the study of philosophy.
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Dictionary Today
The official dictionary for the People's Republic of China which allows users to utilize keyword searches for dictionary definitions, thesaurus options and other resources in Chinese and English.
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Dictionary.com
The dictionary provides entries from different, linked Web site sources, and includes syllable markings, function, pronunciation key, inflected forms, definitions, usage examples, and etymology.
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E-learning Glossary
Collection of terms and their definitions compiled by e-learning experts.
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European Union Glossary
Contains over 200 terms relating to European integration and the institutions and activities of the EU.
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Free On-line Dictionary of Computing
FOLDOC is a searchable dictionary of over 13,000 definitions containing acronyms, jargon, programming languages, tools, architecture, operating systems, networking, theory, conventions, standards, mathematics, telecoms, electronics, institutions, companies, projects, products, and history related to computing.
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Freesearch
UK based web search destination which includes a separate Picture Search and an Online Dictionary.
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German - English Dictionary
Contains translation from English to German, or from German to English.
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Glossary of Biochemistry and Molecular Biology
Searchable, browseable online glossary containing about 3000 terms.
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Glossary of Business Terms
Search or browse a list of standard business terms and their definitions.
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Glossary of Comet and Astronomical Terms
Alphabetical list of terms with explanations for commonly encountered concepts in astronomy.
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Glossary of Economic Terms
Contains standard definitions for terms commonly used by the Federal Reserve Banks.
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Glossary of Literary Terms
Alphabetical list of commonly found terms in literature.
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Glossary of Terms & Symbols Used in Pharmacology
Browsable list of terms with detailed definitions and crosslinked related terms.
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Glossary of Terms Used in Physical Organic Chemistry
IUPAC recommended definitions for common terms in physical and organic chemistry.
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Grammatisch-kritisches Wörterbuch
Grammatisch-kritisches Wörterbuch der hochdeutschen Mundart, mit beständiger Vergleichung der übrigen Mundarten, besonders aber der Oberdeutschen, von Johann Christoph Adelung.
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Investopedia.com Dictionary
Dictionary of more than 4,500 business terms.
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IUPAC Compendium of Chemical Terminology
Collection of terms with authoritative definitions, spanning the whole range of chemistry compiled by the International Union of Pure and Applied Chemistry.
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Lexicon of Linguistics
Search for linguistic terms or concepts by keyword, or browse through the alphabetic list.
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LookWAYup
LookWAYup is a multilingual dictionary that tolerates small spelling errors, shows definitions for multiple senses of the word, and for each sense shows synonyms, related terms, and usage examples.
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Medi Lexicon
A dictionary of over 200,000 medical, pharmaceutical, biomedical & healthcare acronyms and abbreviations.
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MedTerms Medical Dictionary
Contains easy-to-understand explanations for over 16,000 medical terms.
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Merriam-Webster OnLine
The dictionary provides pronunciation, function, usage, etymology and definitions with links to related terms; the thesaurus gives word function, usage examples, synonyms and related words.
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NAL Agricultural Thesaurus
NALT is an online vocabulary look-up tool for agricultural and biological terms.
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NetLingo.com - The Internet Dictionary
NetLingo contains thousands of words and definitions that describe the online world of business, technology, and communication.
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Nuclear Regulatory Commission Glossary
Full text glossary of commonly used terms found in nuclear energy and related fields.
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ODLIS: Online Dictionary for Library and Information Science
ODLIS includes not only the terminology of the various specializations within library science and information studies but also the vocabulary of publishing, printing, binding, the book trade, graphic arts, book history, literature, bibliography, telecommunications, and computer science.
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OECD Glossary of Statistical Terms
The OECD Glossary of Statistical Terms contains a comprehensive set of definitions of the main data items collected by the OECD.
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OneLook® Dictionary Search
This Web site will search other dictionary Web sites for the entered term.
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Oxford English Dictionary
The OED is an historical dictionary of English, covering the language from the earliest times to the present day.
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Oxford Reference Online : Humanities & Social Sciences
Contains the full text of over 150 books in general reference, language, science and medicine, humanities and social sciences, and business and professional subjects published by Oxford University Press.
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Photography Dictionary
Contains a combination of many different photography dictionaries, glossaries, and other photography related information.
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Principal Metals Glossary
A glossary of over 1000 metallurgical terms.
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Stockbrokers Glossary
Browsable glossary of commonly used terms found in stock investing.
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Terms of Environment: Glossary, Abbreviations, and Acronyms
Glossary of environmental terms compiled by the US Environmental Protection Agency (EPA).
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Textile Dictionary
A browsable dictionary subdivided into: Cotton fibres, Standard Worsted and Wool Fibres, Standard Silk and Silk Imitation Fibres, Specialty Fibres, Plant Fibres, Manmade Fibres and Miscellaneous Fibres.
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Trésor de la Langue Française Informatisé
Online version of authoritative dictionary of 19th-20th century French language.
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Visual Dictionary Online
Search themes to quickly locate words, or find the meaning of a word by viewing the image it represents.
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Water Words Dictionary
A compilation of technical water, water quality, environmental, and water-related terms.
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Webster's Online Dictionary
The Rosetta Edition of the Websters Dictionary contains the origins, histories, and meanings of words.
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WordIQ
A comprehensive and searchable reference tool for the web offering search results from a diverse array of dictionaries, encyclopedies, thesauri, and other valuable references.
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Your Dictionary.com™
Enter a term in the dictionary/thesaurus look-up box for English or use the word translator and type in a word and select from one of these languages to translate from or to: English, French, German, Italian, Portuguese, or Spanish.
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