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τμῆ-μα, ατος, τό, (τέμνω) 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.