LSJ
ἡ, quickness in seizing an opportunity, Sch. T Il. 10.204, Sch. A. Th. 97 ; cf. ὀξυλάβεια.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
ἡ, = ὀξυλάβεια, Schol. Aesch. Spt. 97.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)