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2010 - New Age Dictionary Database
By Oddity Software
 
1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.
 
1919 - The Winston Simplified Dictionary
By William Dodge Lewis, Edgar Arthur Singer

Word of the day

abo group

  • a classification system for the antigens of human blood; used in blood transfusion therapy; four groups are and B AB O
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