What is "camber arch"

Camber \Cam"ber\, 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).

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.

   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.

n. (context architecture English) An arch whose intrados, though apparently straight, has a slightly concave curve upward.

n. an arch with a straight horizontal extrados and a slightly arched intrados