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2006 - WordNet 3.0
By Princeton University
 
1919 - The Winston Simplified Dictionary
By William Dodge Lewis, Edgar Arthur Singer
 
1899 - The american dictionary of the english language.
By Daniel Lyons
 
1894 - The Clarendon dictionary
By William Hand Browne, Samuel Stehman Haldeman
 
1919 - The Concise Standard Dictionary of the English Language
By James Champlin Fernald
 
1871 - The Cabinet Dictionary of the English Language
 
1790 - A Complete Dictionary of the English Language
By Thomas Sheridan

Word of the day

Pyrrolidinones

  • A compounds that are derivatives oxo-pyrrolidines. member this group 2-oxo pyrrolidine, which is an intermediate in the manufacture of polyvinylpyrrolidone. (From Merck Index, 11th ed)
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