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 &root;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.]
© Webster 1913.