Webster's English Dictionary

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abscess

ab.scess \'ab-.ses\ \-.sest\ n [L abscessus, lit., act of going away, fr. 
   abscessus, pp. of abs]cedere to go away, fr. abs-, ab- + cedere to go - 
   more at CEDE : a localized collection of pus surrounded by inflamed tissue  
   - ab.scessed aj