porphin
/ˈpɔːfɪn/(also porphine) Chemistry
noun
A purple crystalline solid, C20H14N4, which has a macrocyclic aromatic molecule consisting of four pyrrole rings linked by —CH= groups, and of which the porphyrins are derivatives.
Origin
1920s; earliest use found in British Chemical Abstracts. From German Porphin, shortened from Porphyrin.