The plural of the Greek word anathema was anathemata. Unfortunately for many would-be scholars, with a little knowledge of ancient Greek, this is not the normal plural of anathema in English. This is mostly because there are two meanings of the word. The first, and commonest, is a 'curse', and the plural is anathemas. There is a much rarer meaning of the word: OED has, as meaning 3: "A thing devoted or consecrated to divine use". In English, this use is restricted to rarefied levels of those whose profession is the church. See further anathema.