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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
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe

Word of the day

Hydrocorallia

  • division Hydroidea, including those genera that secrete a stony coral, as Millepora and Stylaster. Two forms of zooids life project from small pores in the coral resemble other hydroids. See Millepora.
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