Bailly
α, ον [ᾱ] d’Apis,
càd. du Péloponnèse, ESCHL.
Suppl. 117 ; ἡ Ἀπία γαῖα, ESCHL.
Ag. 257 ; SOPH.
O.C. 1303, la terre d’Apis, le Péloponnèse.
Étym. Ἄπις.
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LSJ
α, ον, Apian, i.e.
Peloponnesian, said (in this sense) to be derived from Ἆπις, Apis, a mythical king of Argos, A. Supp. 260, cf. Paus. 2.5.7; Ἀπία γῆ, Ἀπία χθών, or Ἀπία alone, the Peloponnese, esp.
Argolis, A. Ag. 256, S. OC 1303, Ath. 14.650b, etc. ; cf. Ἀπίς prob. in A.R. 4.1564.
[The former word has α, the latter α; yet S. OC 1685 uses signf. I with α, and later Ep. Poets have signf. II with α, cf. Rhian. 13.] (Commonly derived from ἀπό, as ἀντίος from ἀντί; and Hsch. expl. ἐξ ἀπίης γαίης by ἀλλοτρίας ἢ ξένης ἢ μακρὰν οὔσης, cf. Str. 8.6.9.)
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)