Apotome
Pronunciation : A*pot"o*me
Part of Speech : n.
Etymology : [Gr.
Definition : 1. (Math.)
Defn: The difference between two quantities commensurable only in power, as between sq. root2 and 1, or between the diagonal and side of a square.
2. (Mus)
Defn: The remaining part of a whole tone after a smaller semitone has been deducted from it; a major semitone. [Obs.]
Source : Webster's Unabridged Dictionary, 1913