ἡμιτόνιον

English (LSJ)

τό,

   A semitone, Philol.6, Aristox.Harm.p.21 M., al., D.H.Comp.11, Arr. Epict.2.11.2, etc.    II half the skein or bundle of gut in a torsionengine, Ph.Bel.68.46, HeroAut.2.6.    2 one of the two frames containing the τόνος in such an engine, Id.Bel.90.4.