LSJ
τό, terra firma, once in Hom., ποτὶ ξερὸν ἠπείροιο Od. 5.402 ; ποτὶ ξερὸν ἔλθ’ ἀπὸ πέτρας to the mainland, AP 6.304 (Phan.), cf. A.R. 3.322 ; ἐπὶ ξερόν Nic. Th. 704. (Cogn. with σχερός rather than with ξηρός.)
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)