συνίζησις
εως, ἡ
A.
subsidence, collapse, of the earth, ἐς τὰ κοῖλα Id. Mu. 396a3 (but γῆ [ἐγένετο] κατὰ συνίζησιν (sc. τοῦ ὕδατος) Sch.Hes. Th. 115); οἰκοδομημάτων Plu. Crass. 2: metaph., Plot. 2.2.1.
2.
synizesis, melting of two vowels into one, without alteration of letters, as in πόλεως, μὴ οὐ, etc., EM 735.36, Sch.Heph. 2.1; but = συγκοπή, EM 279.8.
3.
compression of air, Hero Spir.Praef.