LSJ
ον, in that very hour, ἀγώγιμον αὐθωρόν, of a spell, taking immediate effect, PMagLond. 121.300.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
TBESG
taking immediate effect (MT)
Translators Brief lexicon of Extended Strongs for Greek based on Abbot-Smith, A Manual Greek Lexicon of the New Testament (1922) (=AS), with corrections and adapted by Tyndale Scholars