Kururumi listened to her classmates' answers for a little before raising her hand to offer her own. "Professor, all materials have the potential to be a poison - although most people first thing of things like arsenic compounds to be them. A poison is is any product or substance that can harm someone if it is used in the wrong way, by the wrong person, or in the wrong amount. For example, I have a friend who is allergic to mangoes and, if she ate one even in a small amount, it could be fatal to her. What makes a poison different from a toxin or a venom is that a poison is something ingested through the gut or skin, while the other two are absorbed through different methods such as an animal bite."