toxaphene Syllabification: (tox·a·phene)Pronunciation: /ˈtäksəˌfēn/Definition of toxaphene noun a synthetic amber waxy solid with an odor of chlorine and camphor, used as an insecticide. It is a chlorinated terpene. Origin: 1940s: from toxin + (cam)phene, a related terpenetoxaphene in other Oxford dictionaries Definition of toxaphene in the British & World English dictionary