polychlorinated naphthalene UK /ˌpɒlɪˌklɔːrɪneɪtɪd ˌnæfˈθæliːn/US /ˌpoʊliˌklɔrəˌneɪtəd ˌnæfˈθæliːn/ noun1 •Any of a range of compounds manufactured by treating naphthalene with chlorine; they have a variety of properties and uses. formspolychlorinated naphthalenes
