Definitions

1. verb

to give off light, typically in the form of rays or a glow, as a result of a chemical reaction or other process

“The scientist said that the chemical would fluoresce under ultraviolet light, allowing us to detect its presence.”

2. noun

a substance that glows in the dark, especially as a result of being exposed to ultraviolet light

“The glowing paint on the sign was a type of fluorescent that would remain visible in low light conditions.”