||A*pot"o*me (?), n. [Gr. ? a cutting
off, fr. ? to cut off; ? from + ? to cut.] 1.
(Math.) The difference between two quantities commensurable
only in power, as between √2 and 1, or between the diagonal and side
of a square.
2. (Mus) The remaining part of a whole tone
after a smaller semitone has been deducted from it; a major semitone.
[Obs.]