Definition of Amoeba

1. Take the Tummy Trouble Quiz
2. Digestive Disease Myths Slideshow Pictures
3. Ulcerative Colitis Slideshow

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.

Need help identifying pills and medications?
Use the pill finder tool on RxList.