Fluorescence was a form of luminescence, or rather, was a type of light emission given off by a substance that had previously absorbed light.
Mezoti's science fair project was establishing a Teirenian ant colony where she injected a blue ion dye into the soil, which allowed the drones produced a fluorescent enzyme after they were activated by their queen. (VOY: "Child's Play")
In 2374, Tom Paris described Harry Kim's level of greenness upon first joining the crew of USS Voyager as "deep, almost fluorescent green". (VOY: "Demon")