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 (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.


(əˈtriːʒɪə; -ʒə)
(Pathology) absence of or unnatural narrowing of a body channel
[C19: New Latin, from Greek atrētos not perforated]


(əˈtri ʒə, -ʒi ə)

the absence, or failure to develop, of a normal body opening or duct, as the ear canal.
[1800–10; < Greek a- a-6 + três(is) perforation + -ia -ia]
a•tre′sic (-zɪk, -sɪk) a•tret•ic (əˈtrɛt ɪk) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.atresia - an abnormal condition in which a normal opening or tube in the body (as the urethra) is closed or absent
abnormalcy, abnormality - an abnormal physical condition resulting from defective genes or developmental deficiencies


n. atresia, cierre congénito anormal de una abertura o conducto del cuerpo.
References in periodicals archive ?
In addition, Alex, now nine, has aural atresia - meaning he does not have an ear canal.
Madhavan Unny and Ajithkumar (2016) reported rare case of aural atresia and microtia in goat in Kerala, India.
Long-term stent use can prevent postoperative canal stenosis in patients with congenital aural atresia. Otolaryngol Head Neck Surg 2012; 146 (4): 614-20.
ALFORD study of 118 cases of aural atresia prevalence of ear abnormalities with facial palsy is seen in 13% of cases where as inner ear abnormalities are seen in 22% of cases.
Among the topics are the Eustachian tube, laboratory tests of vestibular and balance functioning, aural atresia and unilateral hearing loss, benign neoplasms of the temporal bone, and evaluating and managing pulsatile tinnitus.