poisonous, venomous

Poisonous vs. Venomous Animals
Have you heard the words venomous and poisonous in reference to animals? Do you know what they mean?

There is a big difference between venomous organisms like this black widow spider and poisonous animals like some frogs. It is easy to tell the difference between a venomous animal and a poisonous animal if you if you understand how they use the toxins.

Venomous animals store toxins internally and release them through biting or stinging, disabling what ever organism they bite or sting.

Poisonous animals usually secrete toxins through their skin so that whatever creature bites or touches them is poisoned. The toxins have different uses. Venomous animals use toxins to help them capture prey. Poisonous animals use toxins to defend themselves. One uses toxins to make dinner while the other uses toxins so they aren’t dinner.

http://www.chevroncars.com/learn/wondrous-world/animals/poisonous-vs-venomous-animals

そうすると、毒キノコは"poisonous"になるね。