LSJ
ον, = ἀφρόντιστος, Zonar. Act., χαλκὸς ἀ., i.e. ὁ ἀθερίζων καὶ οὐδενὸς ἔχων λόγον, A. Fr. 128 (cod. -ιτον). (< θερίζω) not reaped, Thphr. HP 8.11.4, PTeb. 72.372 (ii BC), PFay. 112.13 (i AD).
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)