Meaning of HEMORRHOIDS
 Webster's 1913 Dictionary |
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| | Definition: | | \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.]
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| Medical Dictionary |
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| | Definition: | | Enlarged, swollen veins in the anal area. |
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| Biology Dictionary |
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| | Definition: | | Hemorrhoids are dilated veins in the anus. Internal hemorrhoids: dilated veins of the plexuses of the superior and middle hemorrhoidal veins above the mucocutaneous junction. Internal hemorrhoids drain to the portal vein. External hemorrhoids: dilated veins of the inferior hemorrhoidal plexus below the mucocutaneious junciton the the tissues beneath the anal epithelium of the anal canal. External hemorrhoids drain into the systemic circulation. These veins become symptomatic when the venous pressures increase: such as in constipation, straining to defecate, pregnancy, tumors, and portal hypertension. |
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