luciferin definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a substance in luminescent organisms, as fireflies, that produces light by combining with oxygen in the presence of luciferase
Origin: Classical Latin lucifer (see Lucifer) plush -in
luciferin definition by American Heritage Dictionary
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 and ATP.
Origin: Latin lūcifer, light-bringing; see lucifer + -in.