Answer: quartertone

AnswerCrossword Clue
QUARTERTONESmall musical interval
QUARTERTONESmall music interval
QUARTERTONESmall musical interval sung in choral warmups
QUARTERTONEMusical interval.
QUARTERTONE1-24 of an octave
QUARTERTONEHalf of a half step in music