(ˌtɛtrəˈpɪrəʊl) n (Chemistry) a chemical formed from four pyrrole rings
tetrapyrrole
tetrapyrrole
[‚te·trə′pī‚rōl] (organic chemistry) A chemical structure in which four pyrrole rings are joined in straight chains, as in a phycobilin, or as joined rings, as in a chlorophyll.
tetrapyrrole
tet·ra·pyr·role
(tet'ră-pir'ōl), A molecule containing four pyrrole nuclei; for example, porphyrin.