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valence band

noun
  1. See energy band
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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

valence band in Science

valence band

  1. The outermost electron shell of atoms in an insulator or semiconductor, in which the electrons are too tightly bound to the atom to carry electric current. Compare conduction band. See also bandgap.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.