substrāmen, ĭnis, n. [substerno],
I what is strewn under , litter : molle, Varr. R. R. 3, 10, 4; 3, 6, 5; 3, 9, 8.—
II Transf., supports : lubrica roboreis aderant substramina plaustris, i. e. rollers , Sil. 12, 444.