noun
64th note; hemidemisemiquaver; semidemisemiquaver
A note with a duration of 1/64 of a whole note, used in music notation.
この楽譜には六十四分音符がたくさん出てくる。
This score contains many 64th notes.
Compound of 六十四 (sixty-four) + 分 (division) + 音符 (musical note).