συναίρεσις

συναίρ-εσις, εως, ἡ,

• taking or drawing together, ἡ τῶν ἄκρων εἰς ταὐτὸ σ. Longin. 10.3; σ. (sc. καρπῶν) Ath. 11.489f; contraction, closing, τῶν διοδευθησομένων χωρίων Sor. 2.59.
• • • 2 contraction of front, opp. αὔξησις, Ascl. Tact. 11.7; shortening, reduction of an estimated distance, Ptol. Geog. 1.8.3; τοῦ μήκους (of a fractured limb) Sor. Fract. 19 (συνερεισις cod.).
    • 3 aggregation, Dam. Pr. 96; synthesis, ib. 277, 280; concentration, τῆς νοερᾶς οὐσίας Simp. in Ph. 635.32; generalization, opp. διαίρεσις, Elias in Porph. 76.19.
    • 4 in Gramm., synaeresis, whereby two vowels are not changed, but coalesce into a diphthong, as ὀϊστός, οἰστός, opp. διαίρεσις, Quint. Inst. 1.5.17, A.D. Adv. 132.25; but also contraction, as of κύημα to κῦμα, Gal. 6.642.

συναίρεσις, ἡ, das Zusammennehmen. Bei Gramm. die Zusammenziehung zweier Vokale in einen Diphthong, eigtl. dann, wenn sie keine Veränderung erleiden ; aber auch allgemein z.B. εα in η, Schol. Ar. Ach. 10.