[ hahy-per-fahyn, hahy- ]
/ ˈhaɪ pərˈfaɪn, ˌhaɪ- /
the splitting of the lines of an atomic spectrum, produced by the angular momentum of the nucleus of the atom.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for hyperfine structure
/ (ˈhaɪpəˌfaɪn) /
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