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1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Piles \Piles\, n. pl. [L. pila a ball. Cf. Pill a medicine.]
      (Med.)
      The small, troublesome tumors or swellings about the anus and
      lower part of the rectum which are technically called
      hemorrhoids. See Hemorrhoids.
      Note: [The singular pile is sometimes used.]
            [1913 Webster]
      Blind piles, hemorrhoids which do not bleed.
         [1913 Webster]