» WordCentral.com    Merriam-Webster's site for kids has a student dictionary, Daily Buzzword, and interactive word games. Includes homework help and lesson plans for teachers.    http://www.wordcentral.com/

» Alcwin.org    Site listing several types of dictionaries related to the sciences.    http://www.alcwin.org

» ArtLex    Dictionary of visual art defines more than 3,500 art-related terms. Also includes a comprehensive collection of artwork and famous quotes.    http://www.artlex.com/

» Biographical Dictionary    Read about more than 28,000 notable men and women from history. Search by names, dates, professions, achievements, and more.    http://s9.com/

» Dictionary.com    Online English dictionary, thesaurus and reference guide. Includes word games, online translator, and word of the day feature.    http://dictionary.reference.com/

» DinoDictionary.com    Features profiles of over 300 known dinosaurs along with pronunciations of their names.    http://www.dinodictionary.com/

» Fact Monster    An online dictionary with definitions of more than 125,000 words and links to other related student tools.    http://dictionary.factmonster.com/

» Free On-line Dictionary of Computing    A searchable dictionary of terms from computing and related fields.    http://foldoc.org/

» Giraffian Children's Picture Dictionary    A collection of illustrated words and concepts, aimed at children in preschool or early primary years.    http://www.giraffian.com/pictionary/

» Ice Phoenix Vocab Project    Downloadable program that looks up entire lists of vocabulary words.    http://iphoenix.sourceforge.net/

» InfoVisual    Thematic visual dictionary that focuses on learning through images. Concise definitions within the fields of vegetal biology, animal biology, human anatomy, and transportation.    http://www.infovisual.info/

» Little Explorers    Picture dictionary gives definitions, pictures, and Internet links for over 2,350 entries. Includes translations for English to and from Dutch, French, Spanish, and more.    http://www.enchantedlearning.com/Dictionary.html

» NetLingo Dictionary    Provides a glossary of Internet jargon and acronyms.    http://www.netlingo.com/

» OneLook Dictionary Search    Type in a word and search many dictionaries at once. Also has a reverse dictionary and translations.    http://www.onelook.com/

» PSEUDOdictionary    Defines everyday words including slang, webspeak, and colloquialisms.    http://www.pseudodictionary.com/

» Pidic.com    An online picture dictionary with thousands of images    http://www.pidic.com/

» RhymeZone    Online rhyming dictionary. Search for a word and get a list of potential words that rhyme in addition to a definition.    http://www.rhymezone.com/

» Tech Terms Computer Dictionary    A searchable dictionary of computer terms with definitions explained in simple language.    http://www.techterms.com/

» Terminology Collection: Online Dictionaries    Glossaries for several languages and for specialized fields from the University of Vaasa, Finland.    http://lipas.uwasa.fi/comm/termino/collect/

» The American Heritage Dictionary of the English Language    Contains over 90,000 entries, including 70,000 audio word pronunciations.    http://www.bartleby.com/61/

» The Internet Picture Dictionary    Free, online multilingual picture dictionary with interactive activities for English, French, German, Spanish, Italian and ESL learners.    http://www.pdictionary.com/

» The Skeptic's Dictionary    Definitions and essays on occult, paranormal, and supernatural ideas and practices from the point of view of someone who is a sceptic, that is, does not believe in these things.    http://www.skepdic.com/

» WebDictionary.co.uk    Online dictionary and reference website.    http://www.webdictionary.co.uk

» Webopedia    Definitions of many computer-related terms, from hardware to the internet.    http://www.webopedia.com/

» Wordsmyth    A dictionary and thesaurus in one. Also gives parts of speech and examples for more than 50,000 words.    http://www.wordsmyth.net/

» eLook Dictionary    Provides definitions, synonyms, and related words.    http://www.elook.org/dictionary/

» wordIQ    Search on several different dictionaries, an encyclopedia, and the web.    http://www.wordiq.com/