megaesophagus

noun
mega·esoph·a·gus
variants: or chiefly British megaoesophagus \-i-ˈsäf-ə-gəs \
plural megaesophagi\-ˌgī, -ˌjī \

Medical Definition of megaesophagus 

: dilation and hypertrophy of the lower portion of the esophagus megaesophagus secondary to advanced achalasia— Suil Kim et al

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