A condition in which injured or diseased body tissue dies due to a lack of blood
flow, then becomes infected by bacteria
(especially from the genus Clostridium
) and begins to decay.
Gangrenous tissue often turns black
because bacteria make iron sulfide
from the iron in decaying hemoglobin
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.