Definitions
Toxicant or Poison
A substance that can cause adverse effects in a plant, animal and human.
It does so by impairing vital metabolic function
Toxin:
A Toxicant produced by a living organism such as a microorganism, plant, spider or snake
Hazardous Substance:
May be toxic, corrosive, reactive, flammable, radioactive, infectious or a combination of these
Xenobiotics: Toxins produced outside the body