The first two words of the entry merely illustrate the declension of this adjective. The two forms given, however, are very rare: the nominative singular masculine/feminine only occurs thrice in the writings of Nonnos (Dionysiaca 29.169, 47.160; Paraphrase of the Gospel of John 6.62), while the genitive singular only appears once, in a poem of Gregory of Nazianzus (PG 37.680.6). The source of this grammatical information is unknown.
[1] Not a continuation of the preceding declension but an independent gloss. This form, masculine singular accusative or neuter plural nominative/accusative, is by far the best-attested form of this word. The gloss is from commentary to Homer, who uses the word several times: see scholia to Iliad 1.157 and Odyssey 1.365; and cf. Apollonius Sophistes, Homeric Lexicon 124.24, Hesychius sigma1018.