Plain English Meaning

The shape of the bottom side of the wing, from front to back. It is usually flatter than the top side.

Full Definition

The curvature of the lower surface of an airfoil, measured from the leading edge to the trailing edge. On most wings the lower camber is flatter than the upper camber, and the difference between the two is what causes air to travel at different speeds over and under the wing, producing lift.

Context Anchor

Seen in airfoil diagrams, especially when learning how wing shape relates to lift.

Derivation

comes from the Latin 'camurus', meaning 'curved' or 'arched'. 'Lower' simply specifies which surface of the wing is being described. So 'lower camber' literally means 'the curve of the bottom surface'.