περι-βόλαιον, -ου, τό (περιβάλλω), [in LXX chiefly for כְּסוּת, לְבוּשׁ and cognate forms ;] that which is thrown around, a covering, in NT, (a) a mantle (Psa.102:27, Isa.59:17, al.) : Heb.1:12" (LXX) (b) a veil: 1Co.11:15 (but see ICC, in l).† (AS)
STRONG'S WORD STUDY
G4018 — περιβόλαιον
peribolaion · covering · Greek