poisonous plant poisonous parasol • poisonous substance · · · Info · Definitions · Characters · · poisonous plant · · Text Common · · Latin · · Scripts 15 · · Length 4 · · Syllables Definitions · · · (noun) a plant that when touched or ingested in sufficient quantity can be harmful or fatal to an organism. Synonyms: poisonous plant. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075