Also found in: Thesaurus, Medical, Encyclopedia.
Related to atresic: atresia, antiemetic, atretic


 (ə-trē′zhə, -zhē-ə)
1. The 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 a state of maturity has been reached.

[New Latin atrēsia : Greek a-, not, without; see a-1 + Greek trēsis, perforation, orifice; see terə- in Indo-European roots.]

a·tre·sic (-zĭk, -sĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(əˈtriːzɪk) or


marked by atresia
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
The frequency of each oocyte type (oogonias, previtellogenic, vitellogenic, postvitellogenic, and atresic oocytes) was also estimated in three randomly selected regions of the ovary, which were referenced to a predetermined area of 2.88 [mm.sup.2] of the tissue (Rodriguez-Jaramillo et al.
Ovaries partial spawn (4a, 10x) and remnants (4b, 10x) of Rhamdia voulezi (in the middle) (4c, 20x; 4d, 20x) it can be observed a large number of atresic follicles and (4e, 10x) it is show the post-ovulatory follicle (arrow) and oocytes in another phases; (4c, 40x) detail of post-ovulatory follicles.
Besides, the infant had severe hypoplasia of the right external ear with atresic external auditory canal and agenesia of ossicles.
The duodenum is then mobilized from its retroperitoneal position and the dilated proximal duodenal atresic end is identified.
For patients with calyceal diverticular calculi, the atresic diverticulum mucosa was incised by a holmium laser under monitoring of dynamic B ultrasonic scanning (Fig.
Oocytes of primordial follicle proceeded with atrophy or degeneration, and atresic follicles were observed at high magnification in 3.2 mg/kg ZEA treatment.
In this classification, the hemivagina is completely obstructed; the cervix behind the septum is maldeveloped or atresic, and menses from the uterus behind the septum cannot outflow through the atresic cervix.