trĭ-pĕdālis — Lewis & Short
trĭ-pĕdālis, e, adj.ter,
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.