pararosaniline

/ˌpɛrəroʊˈzænɪlɪn/
noun
  1. A red or purple dye used in chemistry and biology to stain cells and tissues.
    • Pararosaniline is often used in laboratories to highlight specific parts of a cell.
    • The biologist used pararosaniline to stain the bacteria so they could be seen under the microscope.
    • The chemist added pararosaniline to the sample, turning it a bright magenta color.