Origin: Latin suffix -ence
Fluorescence has 2 different meanings across 1 category:
light emitted during absorption of radiation of some other (invisible) wavelength
"The scientist adjusted the UV lamp to excite the fluorescence in the sample, causing it to glow brightly under the invisible radiation."
The emission of light (or other electromagnetic radiation) by a material when stimulated by the absorption of radiation or of a subatomic particle.
"The scientist adjusted the UV lamp to observe the fluorescence emitted by the rare mineral samples under the darkened laboratory lights."