Luke 24:22

ὀρθριναί. ‘At the dawn.’ The idiom by which a circumstance of time or place is expressed by an adjective is quite classical; comp. σκοταῖος ἦλθεν, δαῖτα τένοντο δειελινοί, Aeneas se matutinus agebat, &c. So in English poets we find “the nightly hunter,” “evening sheep,” &c. See my Brief Greek Syntax, p. 82. The Attic form of the word is ὄρθριος.