A note having the time duration of one fourth of the time duration of a whole note.See also [Am.] Quarter note; [Br.] Crotchet; [Fr.] Noire; [Ger.] Viertel; [Ger.] Viertelnote; [It.] Semiminima; [It.] Nera; [Sp.] Negra.divisions of the tone smaller than a semitone are occasionally found in art-music, particularly in the 20th century. Quarter-tones occur in the solo violin part of the second violin concerto of Bela Bartok.