1 corto, breve, pequeñísimo φλόξ Arist.HA 590^a3, τόπος Aristox.Harm.68.12, τὸ ἀκαιριαῖον ζῆν LXX 2Ma.6.25, βιοῦσι μὲν ἀκαριαῖόν τι μέρος τοῦ παντὸς αἰῶνος D.S.1.2, cf. Phld.Ir.40.2, Luc.Herm.6
•subst. τὸ ἀ. instante, breve instante M.Ant.3.10, S.E.P.3.79.

2 adv. -ως en un instante ὁ αἰὼν ... τὸ μέλλον καὶ τὸ ἐνεστός ... καὶ τὸ παρῳχηκὸς ἀ. συνίστησι Clem.Al.Strom.1.13.57, cf. Origenes Fr.88 in Io.12.27, Basil.Hex.2.7, Io.Caes.5.1.186, 5.2.362.