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thirteenth chord

noun
  1. a chord much used in jazz and pop, consisting of a major or minor triad upon which are superimposed the seventh, ninth, eleventh, and thirteenth above the rootOften shortened to: thirteenth
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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