fuchsin

/ˈfjuːksɪn/
noun
  1. A synthetic red or purple dye used in inks, textiles, and as a biological stain.
    • Historically, fuchsin was one of the first synthetic dyes ever created.
    • The lab technician used fuchsin to stain the tissue sample.
    • Fuchsin gives a deep red color to some types of ink.
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