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luciferin

American  
[loo-sif-er-in] / luˈsɪf ər ɪn /

noun

Biochemistry.
  1. a pigment occurring in bioluminescent organisms, such as fireflies, that emits light when undergoing oxidation.


luciferin British  
/ luːˈsɪfərɪn /

noun

  1. biochem a substance occurring in bioluminescent organisms, such as glow-worms and fireflies. It undergoes an enzyme-catalysed oxidation and emits light on decaying to its ground state

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of luciferin

First recorded in 1885–90; from Latin lūcifer ( see Lucifer) + -in 2

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The genome might also enable researchers to track down the enzymes that make luciferin and modulate its release.

From Science Magazine • Aug. 24, 2022

Like many bioluminescent animals their light is created by a reaction between the light-emitting molecule luciferin and the enzyme luciferase.

From National Geographic • Jun. 30, 2018

The chemical ingredient that creates the firefly light, luciferin, tastes like something gnawing at your tongue; it’s corrosive like battery acid.

From The Guardian • Aug. 19, 2015

“An enzyme, luciferase, and a substrate, luciferin, are held in tiny bags called vesicles inside the cell,” he said.

From New York Times • Nov. 7, 2011

But I’m ninety-nine percent sure he has no idea what luciferin is.

From "The Last Cuentista" by Donna Barba Higuera