Besides lacking a gloss, the headword itself, transmitted as eu)/dra, has been deemed faulty: other lexica have it as the (rare) adjective eu)dranh/s. Theodoridis on Photius s.v. suggests that this may be quoted from Cyril, Glaphyra in Pentateuchum 3 (PG 69.497c): plh\n o( no/mos ou)k eu)dranh/s.
Alternatively, a compressed form of eu)/udra, neuter plural of the adjective eu)/udros "well-watered" (attested in Philo Judaeus and the geographer Dionysios).