The primary headword is a nominative singular feminine form of the adjective stono/eis. There are many literary attestations of this form, including Homer, Odyssey 17.102 (singled out by Theodoridis: see n. 1 below) and 19.595, and Oppian, Halieutica 3.436. The secondary lemma, a related masculine noun in the nominative singular, is probably drawn from Homer: see n. 2 below.
[1] = Synagoge sigma238, Photius sigma588 Theodoridis; cf. Hesychius sigma1923, Etymologicum Magnum 728.30, and scholia to Oppian Halieutica 3.436, and to Homer, Iliad 8.159.
[2] = Hesychius sigma1975, Synagoge sigma239, Photius sigma589 Theodoridis. Probably from commentary to Homer, Iliad 10.483; cf. the scholia thereto, and to the accusative in 21.20 and 4.445.