hyperfine structure

US:USA pronunciation: respellingUSA pronunciation: respelling(hī′pər fīn′, hī′-)


WordReference Random House Unabridged Dictionary of American English © 2026
hy′per•fine′ struc′ture  (hī′pər fīn′, hī′-),USA pronunciation [Physics.]
  1. Physicsthe splitting of the lines of an atomic spectrum, produced by the angular momentum of the nucleus of the atom. Cf. fine structure.
  • hyper- + fine1 1925–30

'hyperfine structure' also found in these entries (note: many are not synonyms or translations):
fine structure

Forum discussions with the word(s) "hyperfine structure" in the title:


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