τετράδερμα
From LSJ
Michael Apostolius Paroemiographus, Paroemiae
English (LSJ)
ατος, τό, leather mattress, ground sheet (cf. CR47.211), POxy.1294.4 (ii/iii A.D.), Dura4155 (iii A.D.), restored in PSI6.678 (iii B.C.); τε<τ>ράδερμον, = segestrum, Gloss.