λήθαιος · lēthaios — LSJ
of or causing forgetfulness, πτερόν, of Sleep, Call. Del. 234; σκότος Lyc. 1127, etc.
of persons, oblivious, opp. ἔμφρων, S.E. M. 7.129.
of or from Lethe, ἄκατος AP 9.279 (Bass.); v. λήθη II.
λ. λίθος, = μελιτίτης λ., Ps.-Dsc. 476 ed. Sarac.