amoebiasis, amebiasis; amebiosis, amebism; amebiosis 1. An infection or disease caused by pathogenic amebas; especially, Entamoeba histolytica. 2. Amoebae, or amebae, inhabit the large intestine, where they cause ulcers and inflammation which can mimic ulcerative colitis. Found on http://www.wordinfo.info/words/index/info/view_unit/108/2