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2011 - English Dictionary Database
By DataStellar Co., Ltd
 
1985 - The Free On-line Dictionary of Computing
By Denis Howe
 
1908 - Chambers's Twentieth Century Dictionary of the English Language
By Thomas Davidson
 
1846 - Medical lexicon: a dictionary of medical science
By Robley Dunglison

Word of the day

Quinones

  • Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.
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