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2011 - English Dictionary Database
By DataStellar Co., Ltd
 
2010 - New Age Dictionary Database
By Oddity Software
 
1874 - Etymological and pronouncing dictionary of the English language
By Stormonth, James, Phelp, P. H.

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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