(in chemical reactions) the emission of light by an atom or molecule that is in an excited state.
Origin of chemiluminescence
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Examples from the Web for chemiluminescence
Historical Examples of chemiluminescence
Moreover, as we have seen, chemiluminescence is essentially an oxyluminescence, since oxygen is necessary for the reaction.The Nature of Animal Light
E. Newton Harvey
the phenomenon in which a chemical reaction leads to the emission of light without incandescence
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
The emission of light by a substance as a result of undergoing a chemical reaction that does not involve an increase in its temperature. Chemiluminescence usually occurs when a highly oxidized molecule, such as a peroxide, reacts with another molecule. The bond between the two oxygen atoms in a peroxide is relatively weak, and when it breaks the atoms must reorganize themselves, releasing energy in the form of light. Compare bioluminescence.
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