Polyhalogenated is a term that typically refers to an organic compound that contains multiple halogens, such as fluorine, chlorine, bromine or iodine. There are several synonyms for polyhalogenated, including: - Halogenated: This term refers to any compound that contains a halogen, but not necessarily multiple halogens. - Polybrominated: This term specifically refers to compounds that contain multiple bromine atoms. - Polychlorinated: This term specifically refers to compounds that contain multiple chlorine atoms. - Perhalogenated: This term refers to compounds that contain all available halogens for that particular element (i.e. perfluorinated means all available fluorine atoms are present). - Halopolycarbon: This is a more technical term that specifically refers to polyhalogenated organic compounds.