Free online dictionary, thesaurus, spanish-english and medical dictionaries, audio pronunciations, Word of the Day, word games, and many more high-quality Merriam-Webster language resources.

The public site for Oxford Reference Online - the biggest, most up-to-date, authoritative, and accessible reference work in the world. This huge resource contains almost 2 million words and phrases from Oxford's English language and bilingual dictionaries...

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Explore the updated online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of articles, biographies, videos, images, and web sites.

Online Dictionary - Multiple dictionaries including: English dictionary, medical dictionary, legal dictionary, financial dictionary, computer dictionary, thesaurus, dictionary of acronyms and abbreviations, dictionary of idioms, thesaurus, Columbia encyclopedia, Wikipedia encyclopedia, Hutchinson encyclopedia, examples from classic literature, pronunciations, word browser, glossary. Free access

Knovel is a web-based application integrating technical information with analytical and search tools to drive innovation and deliver answers engineers can trust.