ἑπτάς
From LSJ
ὥσπερ σελήνη γ' ἡλίῳ· τὴν μὲν χρόαν ἰδεῖν ὁμοιόν ἔστι θάλπει δ' οὐδαμῶς → like the moon to the sun: its color is similar to the eye, but it does not give off any heat
English (LSJ)
άδος, ἡ,
A period of seven days, Arist.HA553a3(pl.). II period of seven years, Syria 5.338, etc. III the number seven, Theol.Ar.43, Nicom.Ar.1.16.
German (Pape)
[Seite 1013] άδος, ἡ, eine Anzahl von sieben, dah. = ἑβδομάς, die Woche, Arist. H. A. 5, 20. 27; Nicom. arithm.