Other dictionaries you might need:
Merriam-Webster Online
http://www.m-w.com/
Merriam-Webster provides a free online dictionary, thesaurus, audio
pronunciations, Word of the Day, word games, and other English language
resources.
Dictionary.com
http://dictionary.reference.com/
This is a free online English dictionary, thesaurus and reference
guide, crossword puzzles and other word games, online translator and
Word of the Day.
American Heritage Dictionary
http://www.bartleby.com/61/
Over 90,000 entries feature 10,000 new words and senses, 70,000 audio
word pronunciations, 900 full-page color illustrations, language notes
and word-root appendixes.
Yahoo! Directory Dictionaries > By Language
http://dir.yahoo.com/Reference/Dictionaries/Language/
Yahoo! Search Directory's listing of language dictionaries from
Afrikaans to Yiddish.
RhymeZone
http://www.rhymezone.com/
A language arts reference tool and comprehensive search engine for
words. Includes the functions of a rhyming dictionary, thesaurus, and
spelling checker, as well as an integrated full-text search engine for
all of Shakespeare's works and thousands of quotations and poems."
On-Line Medical Dictionary
http://cancerweb.ncl.ac.uk/omd/
OMD is a searchable dictionary created by Dr. Graham Dark and contains
terms relating to biochemistry, cell biology, chemistry, medicine,
molecular biology, physics, plant biology, radiobiology, science and
technology. It includes: acronyms, jargon, theory, conventions,
standards, institutions, projects, eponyms, history, in fact anything
to do with medicine or science.
MedTerms Medical Dictionary
http://www.medterms.com/script/main/hp.asp
MedTerms online medical dictionary is the medical reference for
MedicineNet.com, containing easy-to-understand explanations of over
10,000 medical terms. This online medical dictionary provides quick
access to hard-to-spell medical definitions through an extensive
alphabetical listing.
ArtLex Art Dictionary
http://www.artlex.com/
You'll find definitions for more than 3,500 terms used in discussing
visual culture, along with thousands of supporting images,
pronunciation notes, great quotations and cross-references.
SYMBOLS.com
http://www.symbols.com/
SYMBOLS.com contains more than 2,500 Western signs, arranged into 54
groups according to their graphic characteristics. In 1,600 articles
their histories, uses, and meanings are thoroughly discussed. The signs
range from ideograms carved in mammoth teeth by Cro-Magnon men, to hobo
signs and subway graffiti.
Webopedia
http://www.pcwebopedia.com/
An online computer dictionary and internet search engine for computer
and Internet technology definitions.
Dictionary of Algorithms and Data Structures
http://www.nist.gov/dads/
This is a dictionary of algorithms, algorithmic techniques, data
structures, archetypical problems, and related definitions. Algorithms
include common functions, such as Ackermann's function. Problems
include traveling salesman and Byzantine generals. Some entries have
links to implementations and more information.
Biographical Dictionary
http://www.s9.com/biography/
This dictionary covers more than 28,000 notable men and women who have
shaped our world from ancient times to the present day. The dictionary
can be searched by birth years, death years, positions held,
professions, literary and artistic works, achievements, and other
keywords