Definition of fine-structure constant in English:

fine-structure constant

Syllabification: fine-struc·ture con·stant

noun

Physics
  • A fundamental and dimensionless physical constant, equal to approximately 1/ 137, that occurs in expressions describing the fine structure of atomic spectra.
    More example sentences
    • Some of these constants, such as the fine-structure constant, are dimensionless and are not expressed in terms of units.
    • The researchers concluded that the fine-structure constant might well be constant, and that the variation seen in the prior work was highly unlikely.
    • Even atomic clocks can detect drifts in the fine-structure constant only over days or, at most, years.

More definitions of fine-structure constant

Definition of fine-structure constant in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day coloratura
Pronunciation: ˌkɒlərəˈtjʊərə
noun
elaborate ornamentation of a vocal melody