αἴθριον

From LSJ

νύκτα οὖν ἡμέραν ποιούμενος → without delay, as soon as possible, as fast as possible, making the night day, making night into day, turning night into day

Source

Russian (Dvoretsky)

αἴθριον: τό (лат. atrium) атрий, передняя (в римск. доме) Luc.

Dutch (Woordenboekgrieks.nl)

αἴθριον -ου, τό zie αἴθριος.