hemidemisemiquaver

from WordNet (r) 3.0 (2006)

hemidemisemiquaver
    n 1: a musical note having the time value of a sixty-fourth of a
         whole note [syn: {sixty-fourth note}, {hemidemisemiquaver}]

from The Collaborative International Dictionary of English v.0.48

Hemi-demi-semiquaver \Hem`i-dem`i-sem"i*quaver\, n. [Hemi- +
   demi-semiquaver.] (Mus.)
   A short note, equal to one fourth of a semiquaver, or the
   sixty-fourth part of a whole note.
   [1913 Webster]