Same or similar entry in other lexica. The headword is masculine accusative singular or neuter nominative/accusative singular of this adjective. It must be quoted from somewhere. All extant examples outside lexicography occur in Cyril of Alexandria, and Theodoridis on Photius s.v. suggests PG 69.529d (from Glaphyra in Exodum 3).
The gloss here is the headword at epsilon 3636.