[ kem-uh-loo-muh-nes-uhns ]

  1. (in chemical reactions) the emission of light by an atom or molecule that is in an excited state.

Origin of chemiluminescence

First recorded in 1900–05; chemi- + luminescence

Other words from chemiluminescence

  • chem·i·lu·mi·nes·cent, adjective

Words Nearby chemiluminescence Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use chemiluminescence in a sentence

  • 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

British Dictionary definitions for chemiluminescence


/ (ˌkɛmɪˌluːmɪˈnɛsəns) /

  1. the phenomenon in which a chemical reaction leads to the emission of light without incandescence

Derived forms of chemiluminescence

  • chemiluminescent, adjective

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

Scientific definitions for chemiluminescence


[ kĕm′ə-lōō′mə-nĕsəns ]

  1. 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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