eosin
/ˈiːəsɪn/
noun
- A red fluorescent dye used in biology to stain cells and tissues for microscopic examination.
- The biologist used eosin to highlight the cytoplasm of the cells under the microscope.
- When eosin binds to proteins, it gives them a pink or red color that is easy to see.
- Eosin is often paired with hematoxylin in a common staining technique called H&E stain.