scape-goat
scape-goat: caper emissarius, Vulg. Lev. xvi. 26. Phr.: am I to be the s. of your folly? men' piacularem oportet fieri ob stultitiam tuam? Pl. Epid. 1, 2, 36. (So perh. piaculum: cf. Liv. 21, 10, ad fin., nec delendum solum id piaculum [Hannibalem] rupti foederis, etc.)