Similar entry, according to Adler, in the Ambrosian Lexicon. The headword adjective -- here neuter singular -- is rare but does occur in e.g. Aeschines 3.131 (ἀκαλλιερήτων ὄντων τῶν ἱερῶν ) & 152 (the same phrase repeated), genitive plurals which both generated scholiastic comment. Other instances in Lucian and Philostratus.