In medicine, poisons are a kind of toxin that are delivered passively, not actively. In biology, a poison is a chemical substance causing death, injury or harm to organisms or their parts. Poisoning could be accidental or deliberate, and if the cause can be identified there may be ways to neutralise the effects or minimise the symptoms. Whether something is considered a poison may change depending on the amount, the circumstances, and what living things are present. It may also be applied colloquially or figuratively, with a broad sense. The term is used in a wide range of scientific fields and industries, where it is often specifically defined. ![]() The skull and crossbones has long been a standard symbol for poison. ![]() ![]() The international pictogram for poisonous substances.
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