τμῆμα

A. part cut off, section, piece, Pl. Smp. 191d, al.; segment of a line, Id. R. 509d, Euc. 2.11, etc.; of a circle (i.e. portion cut off by a chord), Arist. Metaph. 1035a34 (pl.), APr. 41b18, Mete. 343a12, Euc. 3 Def. 6, etc.; also of the portion cut off by radii, sector, τὰ ἀφαιρούμενα ὑπὸ τῶν ἐκ τοῦ κέντρου [τμήματα] Arist. Cael. 290a3, cf. Str. 2.5.34; of lunes, ὁ τετραγωνισμὸς ὁ διὰ τῶν τμημάτων Arist. Ph. 185a16; of segments of other figures cut off by straight lines or planes, Democr. 155, Archim. Con.Sph.Prooem., al.; and of segments bounded by a circle and a circumscribed polygon, Papp. 316.2.

2. cut, incision, wound, Pl. Grg. 476c.

3. section of a book, Ps.-Ammon. in APr. 67.39.

4. Astrol., division between two zodiacal signs, Serapio in Cat.Cod.Astr. 8(4).230.