Apotome

(a-poto-me.) [From Gr. apotemno, I cut off.] (Mus.) The difference between the greater and the le semitone; also, the difference between the whole tone and the major semitone.-(Geom.) The difference between two lines or quantities, commensurable only in power. Thus, the diagonal of a square minus one of the sides is the A., and is equal to 1 /2-1. [s. 39]