The terms poison and venom are often used interchangeably, but they actually have very different meanings. It is the delivery method that distinguishes one from the other.

Poison is absorbed or ingested; a poisonous animal can only deliver toxic chemicals if another animal touches or eats it. Venom, on the other hand, is always injected. Every venomous animal has a mechanism (e.g., stingers, fangs, etc.) to inject toxins directly into another animal. It is for these reasons that frogs are can be poisonous to touch or eat, while snakes are venomous when they use their fangs to bite.

Comparison chart

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Poison

Venom

Purpose Inflicts pain or illness Inflicts pain or illness
Delivery method Absorption or ingestion Injection
Form Fluid, gas or some type of solid Usually fluid

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"Poison vs Venom." Diffen.com. Diffen LLC, n.d. Web. 28 Jul 2015. < >