n.
Emission of visible light by living organisms such as the firefly and various fish, fungi, and bacteria.
bioluminescent bi'o·lu'mi·nes'cent adj.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
