Poisonous - definition of poisonous by The Free Dictionary 1 a Containing or being a poison: poisonous fumes b Capable of harming or killing by poison: poisonous tentacles 2 a Full of ill will; malicious or spiteful: a poisonous look
List of poisonous plants - Wikipedia Below is an extensive, if incomplete, list of plants containing one or more poisonous parts that pose a serious risk of illness, injury, or death to humans or domestic animals