A.opening, hole, “ὀπὰς γὰρ εἶχεν οὐκ ὀλίγας [τὸ τριβώνιον]” Ar. Pl.715 ; a mouse's hole, Sannyr.8 ; of holes in the earth, Arist.HA 559a4, al. ; in a door, Luc.Asin.52 ; in a rock, LXXEx.33.22 ; of an orifice in the body, Poll.5.73 ; “ἡ ὀπὴ τῶν ὤτων” Id.2.84 (cod. B).
2. hole in the roof, serving as a chimney, = κάπνη, καπνοδόκη, Ar.V.317 (lyr.), 350 ; “καὶ δι᾽ ὀπῆς κἀπὶ τέγους” Id.Fr.11, cf. Xenarch.4.11.
II. pl., in Archit., holes in the frieze left to receive the beam-ends, Vitr.4.2.4 ; later, of windows, lights in doors, “αἱ ὀ. τῶν τοίχων” Ptol. ap. Simp. in Cael.710.21 ; “σιδήρια ἐξ ὀπῆς” IG4.39 (Aegina, v B. C.).