ὀψῐμᾰθ-ής · opsimath-ēs — LSJ
late in learning, late to learn, Isoc. 10.2, Pl. Sph. 251b, Epicur. Fr. 173; ὀψιμαθεῖς scis quam sint insolentes, Cic. Fam. 9.20.2: c. gen., τῶν πλεονεξιῶν X. Cyr. 1.6.35; κακῶν Isoc. 12.96; τῆς ἀδικίας οἷόν ἐστιν Pl. R. 409b.
vain of late-gotten learning, pedantic, Thphr. Char. 27, Timae. 70, Luc. Salt. 33.