Extended Strong's Greek Lexicon (Abbott-Smith based)
covering
Usage: 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)