σφήνωσις

A. the use of the wedge, Hp. Fract. 31, Orib. 49.8.13.

2. closing up, obstruction, τοῦ πνεύματος Plu. 2.127d, cf. 654a, Placit. 3.15.5; difficult passage, of calculi, Aret. SD 2.3(pl.); obstruction, Alex.Aphr. Pr. 1.107, cf. Gal. 1.284 (pl.); τῶν πόρων Alex.Trall. 1.2; [τῆς κεφαλῆς] plugging up, cold in the head, Cass. Pr. 25; impaction of foetus, Sor. 2.60, Paul.Aeg. 3.76.