ὕπαυγος
From LSJ
νίψον ἀνομήματα, μὴ μόναν ὄψιν → wash the sins, not only the face | wash my transgressions, not only my face
English (LSJ)
ον, of a heavenly body,
A within150 of the sun, combust, Serapio in Cat.Cod.Astr.8(4).230, Paul.Al.L.1 (with Sch.), Steph. in Hp.Aph.2.363D. II less technically, exposed to rays, Orph.Fr. 353.
Greek (Liddell-Scott)
ὕπαυγος: -ον, ὁ ἀνταναλῶν φῶς, Χρησμ. παρ’ Ἰω. Λυδ. π. Μην. 32, Παῦλ. Ἀλεξ.