n. [医]痔, 痔疮

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.]

{Blind piles}, hemorrhoids which do not bleed.