Any of several parasitic amoebas of the genus Entamoeba, especially E. histolytica, causing dysentery and ulceration of the colon and liver.

• 内变形虫，内阿米巴：一种内变形虫属，尤其是内变形虫属中一种寄生性变形虫，引起痢疾及结肠和肝的溃疡