Collins Concise English Dictionary © HarperCollins Publishers::

hemidemisemiquaver /ˌhɛmɪˌdɛmɪˈsɛmɪˌkweɪvə/ n
  1. a note having the time value of one sixty-fourth of a semibreve
    Usual US and Canadian name: sixty-fourth note

'hemidemisemiquaver' also found in these entries:
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