1) Enterotoxin 1) Toxin 
A substance that can kill cells.
A substance toxic to cells in culture, or to cells in an organism.
A chemical toxin that acts directly on the body tissue. It is the most physically destructive component of snake venom.
<pharmacology> Any substance that poisons living cells. ... (09 Oct 1997) ... 
(si´to-tok″sin) a toxin having a specific toxic action on cells of special organs.
Type: Term Pronunciation: sī′tō-tok′sin Definitions: 1. A specific substance, which may or may not be an antibody, that inhibits or prevents the functions of cells, causes destruction of cells, or both.
A cytotoxin is a substance that is poisonous to cells. Cytotoxins are used in the treatment of cancer to destroy cancerous cells.
[n] - any substance that has a toxic effect on cells
noun any substance that has a toxic effect on cells
substance that has a poisonous effect on cells
a substance that has a toxic effect on certain cells.