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PubChem homepage

Thousands of biochemicals and research products. A dedicated team of scientists and support staff. Helping to make your research possible

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 e...

ChemSpider is a free chemical structure database providing fast access to over 26 million structures, properties and associated information.

PLoS ONE: an inclusive, peer-reviewed, open-access resource from the PUBLIC LIBRARY OF SCIENCE. Reports of well-performed scientific studies from all disciplines freely available to the whole world.

Memidex is a free online dictionary and thesaurus with extensive cross-referencing, complete inflections, simple interface, and frequent updates. It

Santa Cruz Biotechnology is the leading supplier of antibodies, antibody support products, gene silencers, biochemicals, buffers, lab reagents and labware

Dictionary.com - the largest and most trusted free online dictionary. Instantly look up accurate and extensive definitions and word meanings, and hear audio pronunciations.

Vocabulary.com helps you learn new words, play games that improve your vocabulary, and explore language.

Definition of word from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.