fluorescent dye; fluorescent pigment; fluorochrome
Technical term used in chemistry, biology, and materials science for substances that emit light upon excitation.
This fluorescent dye glows brightly under ultraviolet light.
We stained the cells with a fluorescent dye and observed them.
蛍光 means 'fluorescence' itself, while 蛍光色素 refers specifically to the dye or pigment that exhibits fluorescence.
色素 is a general term for 'pigment' or 'coloring matter'; 蛍光色素 is a specific type that fluoresces.
Compound of 蛍光 (fluorescence) and 色素 (pigment, dye).