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hyperfine structure: Meaning and Definition of

hy'per•fine' struc'ture

Pronunciation: (hī'pur-fīn', hī"-), [key]
— Physics. Physics.
  1. the splitting of the lines of an atomic spectrum, produced by the angular momentum of the nucleus of the atom. Cf. fine structure.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
hyperextension hyperfocal distance
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