porphyrinogen por·phy·rin·o·gen (pôr’fə-rĭn’ə-jən, -jěn’)
Any of the intermediates in the biosynthesis of heme.
porphyrinuria por·phy·ri·nu·ri·a (pôr’fə-rə-nur’ē-ə, -nyur’-) n. The excretion of abnormal concentrations of porphyrins and related compounds in the urine. Also called purpurinuria.
[pawr-fuh-rit-ik] /ˌpɔr fəˈrɪt ɪk/ adjective, Petrology. 1. of, pertaining to, containing, or resembling , its texture, or its structure. /ˌpɔːfɪˈrɪtɪk/ adjective 1. (of rocks) having large crystals in a fine groundmass of minerals 2. consisting of porphyry porphyry (pôr’fə-rē) An igneous rock containing the large crystals known as phenocrysts embedded in a fine-grained matrix. porphyritic […]
[pawr-fuh-rahyz] /ˈpɔr fəˌraɪz/ verb (used with object), porphyrized, porphyrizing. 1. to subject to .
porphyroblast (pôr-fîr’ē-ə-blāst’) A large crystal that is surrounded by a finer-grained matrix in a metamorphic rock. Porphyroblasts form by the recrystallization of existing mineral crystals during metamorphism. They are analogous to phenocrysts in igneous rock.