Toxin \Tox"in\, Toxine \Tox"ine\, n. [Gr. toxiko`n. See {Toxic}.
]
A poisonous product formed by an organism, such as a
pathogenic bacterium, a plant or an animal, usually having a
high molecular weight, often a protein or a polysaccharide,
but occasionally a low-molecular weight agent such as
{tetrodotoxin}.