Webster's English Dictionary

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abortion

Cross references:
  1. miscarriage           
 
abor.tion \*-'bo.r-sh*n\ n 1: the expulsion of a nonviable fetus : as  1a: 
   spontaneous expulsion of a human fetus during the first 12 weeks of 
   gestation 1b: illegal abortion  2: MONSTROSITY  3a: arrest of development (as 
   of a part or process) resulting in imperfecti on 3b: a result of such 
   arrest