'Hemorrhoid' definitions:

Definition of 'hemorrhoid'

noun

Pain caused by venous swelling at or inside the anal sphincter [syn: hemorrhoid, haemorrhoid, piles]

From: GCIDE

Hemorrhoids \Hem"or*rhoids\, n. pl. [L. haemorrhoidae, pl., Gr. ?, sing., ? (sc. ?), pl., veins liable to discharge blood, hemorrhoids, fr. ? flowing with blood; a"i^ma blood + ? to flow: cf. F. h['e]morro["i]des, h['e]morrho["i]des. See Rheum.] (Med.) Livid and painful swellings formed by the dilation of the blood vessels around the margin of, or within, the anus, from which blood or mucus is occasionally discharged; piles; emerods.
Usage: [The sing. hemorrhoid is rarely used.] [1913 Webster]