haloform(A haloalkane, containing three halogen atoms, e.g. iodoform, CHI3; a haloform reaction is a reaction to produce haloforms from a ketone. For example, if propanone is treated with bleaching powder, the chlorinated ketone so formed reacts to form chloroform)
halogenated pollutant(An organic compound bonded with one of the five halogen elements (astatine, bromine, chlorine, fluorine, and iodine). Several of these compounds contribute to reductions in the concentration of ozone in the stratosphere)