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hemorrhoid

[hem-uh-roid, hem-roid]
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noun
  1. Usually hemorrhoids. Pathology. an abnormally enlarged vein mainly due to a persistent increase in venous pressure, occurring inside the anal sphincter of the rectum and beneath the mucous membrane (internal hemorrhoid) or outside the anal sphincter and beneath the surface of the anal skin (external hemorrhoid).
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Origin of hemorrhoid

1350–1400; Middle English emoroides (plural) < Latin haemorrhoid(a) < Greek haimorroḯda (adj.) discharging blood
Also called piles.
Related formshem·or·rhoi·dal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Word Origin and History for hemorrhoids

n.

plural of hemorrhoid; late 14c., emeroudis, from Old French emorroides (13c.), from Latin hæmorrhoidae, from Greek haimorrhoides (phlebes) "(veins) liable to discharge blood," plural of haimorrhois, from haima "blood" (see -emia) + rhoos "a stream, a flowing," from rhein "to flow" (see rheum). Related: Hemmorhoidal.

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Online Etymology Dictionary, © 2010 Douglas Harper

hemorrhoids in Medicine

hemorrhoid

(hĕmə-roid′)
n.
  1. An itching or painful mass of dilated veins in swollen anal tissue.
  2. hemorrhoids The pathological condition in which such painful masses occur.piles
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.