[1] The headword, which must be quoted from somewhere (not necessarily the Aristophanic line given below), is a poetic neuter accusative plural; the gloss is masculine accusative singular. Likewise or similarly in other lexica: see the references at Photius mu219 Theodoridis.
[2] Aristophanes, Birds 1247-8 (web address 1), here abridged and (by au)tou= becoming a)/n) corrupted; cf. kappa 893, and under pi 1029.
[3] Same etymology in Etymologicum Magnum 576.16.