poi·son·ous 
/ˈpoɪzn̩nəs/ adjective
/ˈpoɪzn̩nəs/ adjective [more poisonous; most poisonous] 1 a : causing sickness or death by entering or touching the body : containing poison
▪ poisonous mushrooms ▪ The leaves of the plant are poisonous. [=toxic] ▪ Chocolate is poisonous to dogs.
b : capable of putting poison into another animal's body by biting it
▪ This species of spider is extremely poisonous. ▪ poisonous snakes 2 : very harmful or unpleasant
▪ poisonous rumors ▪ He was in a particularly poisonous [=nasty] mood last night.
▪ poisonous mushrooms ▪ The leaves of the plant are poisonous. [=toxic] ▪ Chocolate is poisonous to dogs.
b : capable of putting poison into another animal's body by biting it
▪ This species of spider is extremely poisonous. ▪ poisonous snakes
▪ poisonous rumors ▪ He was in a particularly poisonous [=nasty] mood last night.
— poi·son·ous·ly adverb
