LSJ
ή, όν, Hellenic, Greek, Hdt. 4.108, etc. ἑλληνική (sc. γλῶσσα), ἡ, the Greek language, Apoc. 9.11. τὸ Ἑ.
the Greeks collectively, Hdt. 7.139, al. ; Greek soldiery, X. An. 1.4.13.
Greek culture, D.H. 1.89; pl., Hdt. 4.78. τὰ Ἑ.
the history of Greek affairs, Th. 1.97, etc. ; title of works by X., Theopomp.Hist., etc. ; Greek literature, App. BC 4.67.
like the Greeks, οὐ… πατρῷον τόνδ’ ἐδεξάμην νόμον, οὐδ’ Ἑ. E. Alc. 684, cf. Ar. Ach. 115, Plu. Luc. 41; Comp. -ώτερος Id. Comp. Lyc. Num. 1; ἡ συγγνώμη τῆς τιμωρίας Ἑλληνικώτερον Lib. Ep. 75.4; Sup. -ώτατος D. 19.308, D.H. 1.89. Adv. -κῶς in Greek fashion, Hdt. 4.108, E. IT 660, Antiph. 184.
pure Greek, οὐχ Ἑ. λέξις Orus ap. Eust. 859.55, cf. Ael. Dion. Fr. 207, S.E. M. 1.187. Adv. -κῶς in pure Greek, opp. βαρβαρικῶς, Phld. Lib. p. 13 O., cf. S.E. M. 1.243, Porph. Abst. 3.3.
in Hellenistic Greek, opp. Ἀττικῶς, Moer. 1, al. ; but also, opp. κοινόν ΄in common speech΄, Id. 347, al.
pagan, LXX 2 Ma. 4.10, al., Jul. Ep. 84a, Suid. s.v. Διοκλητιανός.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
TBESG
Ἑλληνικκός, -ή, -όν
[in LXX: Jer.46:6 50:16 (יָנָה: aliter in Heb.), 2Ma.4:10 2Mac 4:15 2Mac 6:9 2Mac 11:24 2Mac 13:2, 4Ma.8:8 * ;]
Greek: τ. Ἑλληνικῇ (sc. γλωσσῇ), Rev.9:11.†
(AS)
Translators Brief lexicon of Extended Strongs for Greek based on Abbot-Smith, A Manual Greek Lexicon of the New Testament (1922) (=AS), with corrections and adapted by Tyndale Scholars