Medical Definition of Amoeba

Amoeba: Also ameba. A single-celled (protozoan) organism that constantly changes shape. The word "ameba" is from the Greek "amoibe" meaning "change." Ameba can infect the bowels to cause diarrhea and the liver to cause abscess formation.

Quick GuideDigestive Disorders: Common Misconceptions

Digestive Disorders: Common Misconceptions

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Last Editorial Review: 8/28/2013

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