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| por·phy·rin [ páwrfərin ] (plural por·phy·rins) |
noun |
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| Definition: |
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compound in plants and animals: a metal-containing pigment in animal and plant tissue, consisting of four pyrrole rings linked by methylene groups, e.g. hemoglobin
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| [Early 20th century. < Greek porphura "purple," from the color of the pigments] |
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