Additionally, the term electrotherapy or electromagnetic therapy has also been applied to a range of alternative medical devices and treatments. It has not been found to be effective in increasing bone healing.
The adjective form of belligerent means hostile, or inclined to fight. It can also apply to a group (e.g. belligerent nation) involved in a war. The noun belligerent is from the second definition: it is a group, or especially a country, that is actively fighting in a war.
belligerent 1570s, from L. belligerantem (nom. belligerans), pp. of belligerare to wage war, from bellum war + gerere to bear, to carry. The noun meaning party or nation at war is from 1811. Related: Belligerence; belligerency.