Medical Dictionary
Main Entry:
etio·por·phy·rin Variant:
or chiefly British ae·tio·por·phy·rin /-'por-f&-r&n/ Function:
noun : any of four isomeric porphyrins C
32H
38N
4;
especially : a violet crystalline pigment occurring in nature (as in petroleum andcoal) and formed by degradation of chlorophyll and of heme
