Definitions by NoamNF

semihemidemisemiquaver

A note with the time value of half a hemidemisemiquaver; a hundred twenty-eighth note.

Woah! Is that a semihemidemisemiquaver? How on earth am I supposed to play that?

A note with half the time value of a demisemiquaver; a sixty-fourth note.

Watch the hemidemisemiquavers on measure 42, that'll need some practice.