cam·ber 
(kămbər)
(kămbər)n.
1.
a. A slightly arched surface, as of a road, a ship's deck, an airfoil, or a ski.
b. The condition of having an arched surface.
2. A setting of automobile wheels in which they are closer together at the bottom than at the top.
intr. & tr.v. cam·bered, cam·ber·ing, cam·bers
To arch or cause to arch slightly.
[From Middle English caumber, curved, from Old North French dialectal caumbre, from Latin camur, perhaps from Greek kamara, vault.]