Abbott-Smith Manual Greek Lexicon
ὀρθρινός (G3720)
1 † ὀρθρινός , -ή, -όν ( ὄρθρος ), [in LXX: Ho 6: ( 4 ) 13:3 ( שׁכם hi.), Hg 2:15 ( 14 ), Wi 11:22 *;] late form of ὄρθριος (q.v.), early : Lk 24:22 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain