blue note

English Thesaurus

1. a flattened third or seventh (noun.communication)

hypernym	:	musical note, note, tone,
definition	:	a notation representing the pitch and duration of a musical sound (noun.communication)

part meronym	:	blues,
definition	:	a type of folksong that originated among Black Americans at the beginning of the 20th century; has a melancholy sound from repeated use of blue notes (noun.communication)