LSJ
αι, α, or οι, a, ranged in rows or ranks, of ships on a narrow beach, Il. 14.35; πρόκροσσαι ὅρμεον τὸ ἐς πόντον καὶ ἐπὶ ὀκτὼ νέας Hdt. 7.188; πέριξ αὐτὸ (sc. τὸ χαλκήϊον) γρυπῶν κεφαλαὶ πρόκροσσοί εἰσι Id. 4.152; συνδέσεις οὐ περιφερεῖς, ἀλλὰ πρόκροσσαι not round, but ranged in ranks, Democr. ap. Thphr. Sens. 79, cf. Oppian. H. 4.606; metaph, πρόκροσσοι φερόμενοι ἐπὶ τὸν κίνδυνον rushing in serried ranks into danger, Agathocl. 4. later in sg., fringed, π. περίβλημα Poll. 7.52.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)