phytotoxin Syllabification: (phy·to·tox·in)Pronunciation: /ˌfītəˈtäksin/Definition of phytotoxin noun Botany a poisonous substance derived from a plant. a substance that is phytotoxic, especially one produced by a parasite. phytotoxin in other Oxford dictionaries Definition of phytotoxin in the British & World English dictionary
