coproporphyrin
noun
cop·ro·por·phy·rin
| \ ˌkäp-rə-ˈpȯr-fə-rən
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Medical Definition of coproporphyrin
: any of four isomeric porphyrins C36H38N4O8 of which types I and III are found in feces and urine especially in certain pathological conditions and also in yeast