apotome
noun
apot·o·me
əˈpätə(ˌ)mē
plural -s
in Greek music
: the interval of a semitone in the Pythagorean scale that is slightly greater than half a whole tone and is equal to the difference between the tetrachord and two whole tones
Word History
Etymology
Greek apotomē, literally, cutting off, from apotemnein to cut off, from apo- + temnein to cut