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microtone

[mahy-kruh-tohn]
noun
  1. any musical interval smaller than a semitone, specifically, a quarter tone.
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Origin of microtone

First recorded in 1915–20; micro- + tone
Related formsmi·cro·ton·al, adjectivemi·cro·to·nal·i·ty, nounmi·cro·ton·al·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for microtone

microtone

noun
  1. any musical interval smaller than a semitone
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Derived Formsmicrotonal, adjectivemicrotonality, nounmicrotonally, adverb
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