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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd
 
1898 - Warner's pocket medical dictionary of today.
By William R. Warner
 
1846 - Medical lexicon: a dictionary of medical science
By Robley Dunglison

Word of the day

Toxoids

  • Preparations of pathogenic organisms or their derivatives made nontoxic and intended for active immunologic prophylaxis. They include deactivated toxins.
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