A chemical substance present in the cells of bioluminescent organisms,such as fireflies,that produces an almost heatless,bluish-green light when oxidized under the catalytic effects of luciferase.

• 荧光素存在于生物性发光有机体（比如萤火虫）中的一种化学物质，它在荧光素酶催化作用下氧化时发生几乎没有热量的蓝绿光。