ὀπαῖος · opaios — LSJ
with a hole or opening, διὰ τῆς ὀπαίας κεραμίδος, = διὰ τῆς καπνοδόκης, through the tile with a hole in it (for the smoke to escape), Diph. 84, cf. Moer. p.292P . . Poll. 2.54 :—also ὀπαῖον, τό, IG 1(2).374.127-139 (pl.), Plu. Per. 13 ; cf. ὀπή.—On the reading ἀνʼ ὀπαῖα Od. 1.320, v. ἀνοπαῖα.