Definition of coupling constant in English:

coupling constant

Line breaks: coup|ling con|stant


  • A constant representing the strength of the interaction between a particle and a field.
    More example sentences
    • Newton's constant is the coupling constant for the gravitational force, for example.
    • For electromagnetism, the coupling constant is called the fine structure constant a and is formed by the electron charge, Planck's constant and the speed of light.
    • But its predictions for the coupling constants - the constants that describe the strengths of the strong, weak and electromagnetic interactions - were wrong.

More definitions of coupling constant

Definition of coupling constant in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day astrogation
Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
(in science fiction) navigation in outer space