What does "atresia" mean?

A condition in which a body orifice or passage in the body is abnormally closed or absent.

Atresia

Common synonyms include: canalization failure, closure, obstruction, occlusion, recanalization failure.

noun

noun ·Rare ·Advanced level

Noun

1
A condition in which a body orifice or passage in the body is abnormally closed or absent. countable, uncountable
2
an abnormal condition in which a normal opening or tube in the body (as the urethra) is closed or absent wordnet

From Latin atresia, from Ancient Greek ἀ- (a-, “not, without”) and τρῆσις (trêsis, “perforation”).