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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd
 
2010 - New Age Dictionary Database
By Oddity Software
 
1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.
 
1919 - The Concise Standard Dictionary of the English Language
By James Champlin Fernald

Word of the day

Tetrachlorvinphos

  • An organophosphate cholinesterase inhibitor that is used as insecticide. It has low mammalian toxicity. (From Merck Index, 11th ed)
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