Medical Dictionary

atresia a·tre·sia (ə-trē'zhə, -zhē-ə)

  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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