a form of dysentery caused by an amoeba (Entamoeba histolytica)
See amebic dysentery in American Heritage Dictionary 4
or a·moe·bic dysentery(ə-mēˈbĭk)
noun
An acute disease caused by ingesting substances contaminated with the amoeba Entamoeba histolytica and characterized by severe diarrhea, nausea, and inflammation of the intestines.