contagious toxins definition
This article is about the class of poisonous substances. For other uses, see Toxin (disambiguation). A toxin (from Ancient Greek: ÏÎ¿Î¾Î¹ÎºÏÎ½ toxikon) is a poisonous substance produced within living cells or organisms; synthetic toxicants created by artificial processes are thus excluded. The term was first used by organic chemist Ludwig Brieger (1849â1919).