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2011 - English Dictionary Database
By DataStellar Co., Ltd
 
2006 - WordNet 3.0
By Princeton University
 
1919 - The Winston Simplified Dictionary
By William Dodge Lewis, Edgar Arthur Singer
 
1919 - The Concise Standard Dictionary of the English Language
By James Champlin Fernald

Word of the day

transmutation theory

  • The theory that one species can evolve from another. t. the change of one element into another species or element.
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