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1899 - The american dictionary of the english language.
By Daniel Lyons
 
1914 - Nuttall's Standard dictionary of the English language
By Nuttall, P.Austin.
 
1874 - Etymological and pronouncing dictionary of the English language
By Stormonth, James, Phelp, P. H.

Word of the day

acetyl group

  • the organic group of acetic acid (CH3CO-)
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