pyrrole
pyrrole An organic nitrogen-containing compound (see formula) that forms part of the structure of porphyrins.
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Columella , columella
1. In corals, a rod-like structure formed from the swollen axial end of the counter-septum that may occur as a central structure within the… porphyrin , porphyrin A heterocyclic derivative of a porphin, which is composed of a tetrapyrrole ring structure. As such it is capable of combining with a varie… Structure , structure, social structure A term loosely applied to any recurring pattern of social behaviour; or, more specifically, to the ordered interrelations… inorganic , in·or·gan·ic / ˌinôrˈganik/ • adj. not arising from natural growth. ∎ Chem. of, relating to, or denoting compounds that are not organic (broadly, com… Labyrinth (Ear) , inner ear The structure in vertebrates, surrounded by the temporal bone of the skull, that contains the organs of balance and hearing. It consists of… Sedimentary Structures , sedimentary structure The external shape, the internal structure, or the forms preserved on bedding surfaces, generated in sedimentary rocks by sedim…
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pyrrole