Liddell-Scott-Jones

δύσις (dusis) sunset ^G:N-F

δύσις [ῠ], εως, ἡ,

(δύω) setting of the sun or stars, opposed to ἀνατολή, [Refs 4th c.BC+]; ἀμφὶ Ηλειάδων δύσιν (compare Ηλειάδες) [Refs 4th c.BC+]; δ. χειμερινή, θερινή, ἰσημερινή, [Refs 5th c.BC+]

__2 quarter in which the sun sets, west, πρὸς ἡλίου δύσιν [Refs 5th c.BC+]; πρὸς δύσει [Refs 2nd c.BC+]
__II hiding-place, [Refs 2nd c.AD+]