phytotoxinPronunciation: /ˌfʌɪtə(ʊ)ˈtɒksɪn/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 US English dictionary
