noun. Any of various nocturnal beetles of the family Lampyridae, characteristically having bioluminescent organs in the tip of the abdomen that produce a flashing light.

noun. An insect which has the faculty of becoming luminous; a lampyrid or elaterid beetle which emits phosphorescent light from organs in some part of the body.

noun. Any luminous winged insect, esp. luminous beetles of the family Lampyridæ.

noun. A nocturnal, bioluminescent beetle of the family Lampyridae.

noun. nocturnal beetle common in warm regions having luminescent abdominal organs

noun. tropical American click beetle having bright luminous spots

"But the great thing about it is it does allow somebody to mark a target with what is called a firefly, which is -- it can be a light, a black light, which is not visible on the ground, but which is to somebody flying with night vision goggles."

glowworm  

elater  elaterid  elaterid beetle  

ateenage  aureate  bluish-white  clapped-out  diehard  

blink  blinking  candle fly  coruscation  fire beetle