atresia

[uh-tree-zhuh, -zhee-uh] Origin

a·tre·sia

[uh-tree-zhuh, -zhee-uh]
noun Medicine/Medical.
the congenital absence, or the pathological closure, of an opening, passage, or cavity.

Origin:
1800–10; < Neo-Latin < Greek a- a-6 + três(is) perforation + -ia -ia

a·tre·sic [uh-tree-zik, -sik] , a·tret·ic [uh-tret-ik] , adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Atresia is always a great word to know.
So is pollex. Does it mean:
the first or innermost digit of the foot of humans and other primates or of the hind foot of other mammals; great toe; big toe.
the innermost digit of the forelimb; thumb.
Collins
World English Dictionary
atresia (əˈtriːʒɪə, -ʒə)
 
n
absence of or unnatural narrowing of a body channel
 
[C19: New Latin, from Greek atrētos not perforated]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

atresia
"occlusion of a natural passage in the body," Mod.L., from Gk. atretos "not perforated," from a-, privative prefix, + tresis "perforation."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

atresia a·tre·sia (ə-trē'zhə, -zhē-ə)
n.

  1. The congenital absence or closure of a normal body orifice or tubular passage such as the anus, intestine, or external ear canal.

  2. The degeneration and resorption of one or more ovarian follicles before maturation.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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