any protozoan of the genus Entamoeba, members of which are parasitic in vertebrates, including the human pathogens E. gingivalis, found in dental plaque, and E. histolytica, the cause of amebic dysentery.
Main Entry: ent·ame·ba Variant: or chiefly Britishent·amoe·ba/"ent-&-'mE-b&/ Function: noun Inflected Form: pluralent·ame·basorent·ame·bae/-(")bE/ : any ameba of the genus Entamoeba —ent·ame·bicor chiefly Britishent·amoe·bic/-bik/adjective