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1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.
 
1919 - The Concise Standard Dictionary of the English Language
By James Champlin Fernald
 
1920 - A dictionary of scientific terms.
By Henderson, I. F.; Henderson, W. D.

Word of the day

trigger-area

  • Any point circumscribed area, irritation of which will give rise to functional action or disturbance elsewhere.
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