Medical Dictionary

porphin por·phin (pôr'fĭn) or por·phine (-fēn')
The unsubstituted heterocyclic ring consisting of four pyrrole rings; it is the basic unit of the porphyrins.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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