botulinum is the most deadly poison in the world: one gram spread evenly can kill one million people.
Botulism is caused by the bacterium Clostridium botulinum, a hardy anaerobe.
I have had the neurotoxic protein botulinum injected into my forehead to minimize wrinkles.
botulinum bot·u·li·num (bŏch'ə-lī'nəm) or bot·u·li·nus (-nəs)
An anaerobic, rod-shaped bacterium (Clostridium botulinum) that secretes botulin and inhabits soils.