Sort: Oldest first
 
2010 - New Age Dictionary Database
By Oddity Software
 
1920 - A dictionary of scientific terms.
By Henderson, I. F.; Henderson, W. D.
 
1920 - A dictionary of scientific terms (6th edition)
By J.H. Kenneth
 
1908 - Chambers's Twentieth Century Dictionary of the English Language
By Thomas Davidson

Word of the day

Archaeozoic Era

  • the time prior to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
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