Webster’s Revised Unabridged Dictionary · 1913
Atresia
A·tre′si·a (ȧ·trē′shĭ·ȧ), n. [NL., fr. Gr. ἄτρητος not perforated.] (Med.) Absence or closure of a natural passage or channel of the body; imperforation.
Webster’s Revised Unabridged Dictionary · 1913
A·tre′si·a (ȧ·trē′shĭ·ȧ), n. [NL., fr. Gr. ἄτρητος not perforated.] (Med.) Absence or closure of a natural passage or channel of the body; imperforation.