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WordNet
fecal impaction

n. accumulation of hardened feces in the rectum or lower colon which the person cannot move

Wikipedia
Fecal impaction

A fecal impaction is a solid, immobile bulk of human feces that can develop in the rectum as a result of chronic constipation. A related term is fecal loading which refers to a large volume of stool in the rectum of any consistency.

Usage examples of "fecal impaction".

Also every likelihood of decubitus ulcers, lifelong fecal impaction and incomplete micturition.