Dictionaries

 Glossary of math terms sorted by grade.

Includes: student dictionary, rhyming dictionary, verse composer, links to other dictionaries in the Teacher's Lounge.

 Unabridged version. Includes word of the day and word games.

Includes sound clips of the words.

Specialty dictionaries, Thesauri, Language dictionaries, and more.

The WordReference Dictionaries are free online translation dictionaries in Engish and Spanish, French, Italian, German, Russian and more. Excellent contextual translations.

Quick searches for terms: in biology - vegetation and animal, human body, music, transport, and clothing.

Alphabetical list of definitions for scientists with links to further explanations.

Challenge your students to enrich their vocabulary. 

Search for rhyming words, synonyms, antonyms, definitions, related words, similar sounding words, homophones, match consonants, match letters, find similar spellings, pictures, Shakespeare, and quotations. 

Explanations with examples.

You can look up: collective nouns, proprietary eponyms, contronyms, heteronyms, unusual word forms, negatives without positives, numbers, word oddities, commonly misspelled words, commonly mispronounced words, commonly confused words, phone number words, word frequencies.

The Wordplay Website: Anagrams, Palindromes, Tongue Twisters, Etymology, Word Puzzles, Spoonerisms, Oxymora (Oxymorons), Malapropisms, Pangrams, Mnemonics, Acronyms, Cockney Rhyming Slang.

A multi-volume, multimedia virtual glossary for Phylogenetics, Geology, Biochemistry, Cell Biology, Ecology, Life History, Zoology and Botany.

Visit daily to learn a new word a day. You can also subscribe to the service.

Etymology explored on this site. 

Newspaper columns answering questions about the origins of words. Level: Senior, Adult

 A Canadian history who's who.

Lists print and non-print, computer and, library automation terminology.

Definitions of math terms with examples and activities.

A guide to the most common computer terms with explanations of what they mean.