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Porphyrin

Noun:

1. A group of chemical compounds containing a four-ring structure called porphyrin, composed of four pyrrole rings linked together by methine bridges, and often complexed with a metal atom.

Example: Porphyrins are essential components of many biological systems, including heme in hemoglobin.

Adjective:

1. Pertaining to or derived from porphyrin.

Example: The porphyrin pigments give vibrant colors to many natural dyes.

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