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quarter tone

noun

, Music.
  1. an interval equivalent to half of a semitone.


quarter tone

noun

  1. music a quarter of a whole tone; a pitch interval corresponding to 50 cents measured on the well-tempered scale
“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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Word History and Origins

Origin of quarter tone1

First recorded in 1770–80

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quarterstaffquarter-wave plate