camber

n. [ Of. cambre bent, curved; akin to F. cambrer to vault, to bend, fr. L. camerare to arch over, fr. camera vault, arch. See Chamber, and cf. Camerate. ] 1. (Shipbuilding) An upward convexity of a deck or other surface; as, she has a high camber (said of a vessel having an unusual convexity of deck). [ 1913 Webster ]

2. (Arch.) An upward concavity in the under side of a beam, girder, or lintel; also, a slight upward concavity in a straight arch. See Hogback. [ 1913 Webster ]

Camber arch (Arch.), an arch whose intrados, though apparently straight, has a slightly concave curve upward. --
Camber beam (Arch.), a beam whose under side has a concave curve upward. [ 1913 Webster ]

v. t. [ imp. & p. p. Cambered p. pr. & vb. n. Cambering. ] To cut bend to an upward curve; to construct, as a deck, with an upward curve. [ 1913 Webster ]

v. i. To curve upward. [ 1913 Webster ]