From Longman Dictionary of Contemporary Englishcambercam‧ber /ˈkæmbə $ -ər/ noun [countable, uncountable] TTR technical a slight curve from the centre of a road or other surface to the side, which makes water flow to the side
Examples from the Corpus
camber• Snicking through St Mary's, a sharpish left-hander with an odd camber and change of surface.• Ellie leaned back against the school piano, her gray skirt revealing the camber of her thighs.Origin camber (1600-1700) French cambre, from cambrer “to curve”, from Latin camur “curved” 