WordReference Random House Unabridged Dictionary of American English © 2025
quar′ter tone′, [Music.]
  1. Music and Dancean interval equivalent to half of a semitone.
  • 1770–80

Collins Concise English Dictionary © HarperCollins Publishers::
quarter tone
  1. a quarter of a whole tone; a pitch interval corresponding to 50 cents measured on the well-tempered scale
'quarter tone' also found in these entries (note: many are not synonyms or translations):
diesis - microtone

Forum discussions with the word(s) "quarter tone" in the title:


Look up "quarter tone" at Merriam-Webster
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