The headword is a masculine noun in the nominative singular. This form of the noun is attested only in lexica, scholia, etc. See Hesychius phi723 and phi725, Synagoge phi150, ps.-Herodian (Epimerismi 147.8), Theognostus 138.15, and various scholia: to Aeschylus, Seven against Thebes 661 (where the headword occurs in the dative singular); to Apollonius Rhodius, Argonautica 4.55; to Oppian, Halieutica 1.45; and to Sophocles, Ajax 59. See also phi 809.