ἀποτομή

A. cutting off, τῶν χειρῶν X. HG 2.1.32: in pl., Ti. Locr. 97d.

2. piece, segment, ἀπὸ τοῦ ἀπείρου Epicur. Ep. 2.p.37 U.; γῆς Ph. 2.77, cf. ib. 124 (pl.), Diog.Oen. 24; κόσμου Ocell. 3.3; τοιαύτας ἔχειν τὰς ἀ., of the moon in eclipse, Arist. Cael. 297b25, cf. 294n4, Plot. 6.4.7; end cut off, Dsc. 5.120.

b. in Music, difference between λεῖμμα and τόνος, Gaud.Harm. 14; τοῖς ἡμιτόνιοις τῷ τε ἐλάσσονι καὶ τῷ μείζονι, τουτέστι τοῦ τε λείμματος καὶ τῇ ἀ. ib.16.

c. Math., compound irrational straight line equivalent to binomial surd with negative sign, Euc. 10.83, al.

3. branching off, τῶν φλεβίων Arist. HA 497a17; place where roads intersect, Plb. 6.29.9.

4. division of an argument into sections, D.H. Is. 15.

5. in Tactics, = φαλαγγαρχία (q.v.), Ascl. Tact. 2.10, etc.