noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Abnormal dilatation of the colon, not caused by mechanical obstruction. uncountable
2. 2
   an abnormal enlargement of the colon; can be congenital (as in Hirschsprung's disease) or acquired (as when children refuse to defecate) wordnet
3. 3
   A colon thus enlarged. countable

Synonyms

All synonyms

colitisgastritisperitonitispolypulcer

Etymology

From mega- + colon.

Related phrases

toxic megacolon

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.