Safranin is a type of red or pink dye used in biology to color parts of cells so they can be seen better under a microscope.
Safranin is a special dye used in science to help people see things better.
Examples:
The scientist used safranin to color the cells.
I saw the safranin in the lab.
The safranin made the cells look red.
The safranin turned the cells a funny color.
The safranin made the cells look as red as a firetruck.
The safranin helped the scientist see the cells better.