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por·phy·rin·uria .pȯr-fə-rə-'n(y)u̇r-ē-ə n the presence of porphyrin in the urine called also hematoporphyrinuria
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n.
the presence in the urine of breakdown products of the red blood pigment haemoglobin (porphyrins), sometimes causing discoloration. See porphyria, porphobilinogen.
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por·phy·rin·uria (por″fə-rĭ-nuґre-ə) excessive excretion of one or more porphyrins in the urine; see porphyria.Medical dictionary. 2011.