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zona hemorrhoidalis
[hĕm′ə-roi-dā
′
lĭs]
n.
The part of the anal canal that contains the rectal venous plexus.
annulus hemorrhoidalis
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
