Bioluminescence /(bī"ō̇*lo͡o`mĭ*nĕs"ens)/

Bi·o·lu·mi·nes·cence

Bioluminescence

n.
  1. a type of luminescence produced by biological or biochemical processes, such as a glowworm glow or the action of luciferase on luciferin. A well-known example is that of firefly luminescence. See also luciferin.