different between enlargement vs megaoesophagus

English

enlarge +? -ment

enlargement (countable and uncountable, plural enlargements)

An act or instance of making something larger.
(figuratively) A making more obvious or serious; exacerbation.
- 1874, Thomas Hardy, Far From the Madding Crowd, 2005 Barnes & Noble Classics publication of 1912 Wessex edition, p.337
  Bathsheba underwent the enlargement of her husband's absence from hours to days with a slight feeling of surprise, and a slight feeling of relief; yet neither sensation rose at any time far above the level commonly designated as indifference.
An image, particularly a photograph, that has been enlarged.
(obsolete) Freedom from confinement; liberty.
Diffuseness of speech or writing; a speaking at length.
- 1897, Peter Joseph Cooke, Forensic Eloquence (page 40)
  Briefly, a discourse generally consists in some prefatory remarks which pave the way as it were for the enlargement upon which a speaker usually enters when he speaks to any purpose.

mega- +? oesophagus

megaoesophagus

(pathology) An unusual enlargement of the oesophagus sometimes associated with achalasia

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