Abbott-Smith Manual Greek Lexicon
ἄρκος (G715)
1 (KJV) ἄρκος (Rec. (cl.) ἅρκιος ), [in LXX for דֹּב ;] -ου, ὁ, ἡ , a bear : Re 13:2 . (This form is also found in late Inscr.; MM, s.v.)†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain