Dictionaries / Encyclopedias

  1. American Heritage Book of English Usage -
  2. American Heritage Dictionary -
  3. American Heritage Dictionary of Idioms -
  4. American Heritage Spanish Dictionary -
  5. Answers.com -

    Free access to millions of topics from great dictionaries, encyclopedias, and much more.
  6. Art & Architecture Thesaurus® Online -

    From The Getty Research Institute.
  7. ArtLex Art Dictionary -

    Over 3,600 terms in art and visual culture with images, pronunciation, quotations, and cross-references.
  8. Bartlett's Familiar Quotations -
  9. Biographical Dictionary - S9.com -

    Editable dictionary contains 33,000 notable people from ancient times to present day.
  10. Columbia Encyclopedia -

    Short articles, usually about one paragraph.
  11. Columbia World of Quotations -
  12. Dictionary of American Naval Fighting Ships -
  13. Dictionary of Military and Associated Terms -

    From the Department of Defense.
  14. Dictionary.com -

    Includes a dictionary, thesaurus, quotes, and a full-text translator for English, Spanish, German, Chinese, Portugese, Italian and more.
  15. Encyclopedia of Life -

    Combines resources about all living things into one portal.
  16. Encyclopedia of Psychology -

    Includes information about careers in psychology, phenomena, theories, history of psychology (including biographies), publications, and additional resources.
  17. Encyclopedia Smithsonian -

    Links to resources on topics within the museum from Art to Zoology.
  18. Encyclopedia.com -

    Search multiple encyclopedias at once, including The Columbia Encyclopedia, Oxford’s World Encyclopedia, and the Encyclopedia of World Biography.
  19. Ethnologue: Languages of the World -

    An encyclopedic reference work of all the world's 6,912 known living languages.
  20. FindLaw Legal Dictionary -

    Searchable by keyword.
  21. Gray's Anatomy -
  22. Holocaust Encyclopedia -

    From the United States Holocaust Museum.
  23. How Many? -

    A Dictionary of Units of Measurement.
  24. Internet Picture Dictionary -

    Multilingual picture dictionary with interactive activities for English, French, German, Spanish, Italian and ESL learners.
  25. Language Dictionaries -

    For over 260 languages.
  26. Latin Dictionary and Grammar Aid -
  27. Lawyers.com Legal Dictionary -
  28. Lexicool -

    Directory of bilingual and multilingual dictionaries.
  29. Library Spot! -

    Reference sources, libraries, research tips.
  30. Little Explorers™ Picture Dictionary -

    From EnchantedLearning.com. Versions include: English-Dutch, English-French, English-German, English-Italian, English-Japanese, English-Portugese, English-Spanish, English-Swedish.
  31. Medical Encyclopedia -

    From Medline Plus. Diseases, tests, symptoms, injuries, surgeries; photos and illustrations.
  32. Merck Manual Home Edition -

    "The ultimate online health reference."
  33. Merriam-Webster OnLine -

    Includes: Dictionary, Thesaurus, Spanish-English, Medical, Encyclopedia.
  34. Nolo's Legal Encyclopedia -

    Includes hundreds of free articles on everyday legal topics, written in plain English.
  35. Nolo's Plain-English Law Dictionary -

    Plain language information on a wide range of legal topics.
  36. One Look Reverse Dictionary -

    Describe a concept and get a list of related words and phrases.
  37. Onelook Dictionary -

    Words, phrases, and translations from around the world.
  38. Online Sign Language Dictionaries -
  39. Performing Arts Encyclopedia -

    Guide to performing arts resources at the Library of Congress.
  40. Refdesk.com -

    Huge multidisciplinary reference website with hundreds of resources.
  41. Respectfully Quoted -

    A Dictionary of Quotations.
  42. Roget's International Thesaurus of English Words and Phrases -
  43. Specialty Dictionaries -

    Technical vocabulary in a wide variety of disciplines.
  44. Strunk's Elements of Style -
  45. Talking Dictionaries -

    Recordings of languages that are in danger of becoming extinct, such as Tuvan, Siletz Dee-Ni, and Remo. Presented by the National Geographic Enduring Voices program.
  46. Thesaurus.com -

    Find synonyms and antonyms of words.
  47. U.S. Legal Research Aids -

    Online legal dictionaries and encyclopedias.
  48. Visual Dictionary Online from Merriam-Webster -

    More than 6,000 images with 20,000 terms, definitions, and word pronunciation audio clips.
  49. Visual Thesaurus -
  50. Webopedia -

    Online dictionary and search engine for computer and Internet technology.
  51. Westlaw Glossary for Legal Research Basics -
  52. Wex -

    Legal dictionary and encyclopedia from Cornell’s Legal Information Institute.
  53. Wikipedia -

    The Free Encyclopedia that anyone can edit.
  54. Word and Phrase Origins -

    From the Internet Public Library - provides a selection of resources on finding word and phrase origins, as well as print resources.
  55. Word Reference.com -

    Online translation dictionaries for Spanish, French, Italian, German and Russian.
  56. Your Dictionary.com -

    "The global language resource."
  57. Zimmerman's Research Guide -

    Online encyclopedia for legal researchers.