trĭ-pĕdālis

I. of three feet in measure: latitudo fenestrae, Varr. R. R. 3, 9, 6: altitudo, Plin. 17, 22, 35, § 167: crassitudo parietis, id. 18, 30, 73, § 301: caulis, id. 27, 12, 79, § 104: parma, Liv. 38, 21, 13.