Purpurin definitions

pûr'pyə-rĭn'
A reddish crystalline anthraquinone derivative, C14 H8 O5 , that is isolated from madder root for use as a biological stain and commercial dye.
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A reddish material, C14H5O2(OH)3, isolated from the madder root or produced synthetically: used as a dye, stain, etc.
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A red anthraquinone dye, extracted from madder, that is used as a biological stain.
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(biochemistry) A protein of the lipocalin family.
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A brownish or deep red decorative glass used in ancient times.
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Origin of purpurin

Latin purpura purple purple –in