parietalis
From LSJ
ἐν τῷ διὰ τῆς κατασκευῆς παρεπιφαινομένῳ περίττῳ → through some excess thing which results through poetic elaboration
Latin > English (Lewis & Short)
părĭĕtālis: e, adj. paries,
I of or belonging to walls: parietalis herba, the herb pellitory, Marc. Emp. 13; cf. parietarius, II.