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band spectrum

noun, Physics.
1.
an optical spectrum consisting of groups of closely spaced spectral lines, characteristic of molecules.
Origin
1865-1870
1865-70
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for band-spectrum

band spectrum

noun
1.
a spectrum consisting of a number of bands of closely spaced lines that are associated with emission or absorption of radiation by molecules
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
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