What is the term that describes the curvature of an airfoil?

The term that describes the curvature of an airfoil is camber. Camber refers specifically to the asymmetric shape of an airfoil, which helps to generate lift as air flows over and under the wing. The curvature plays a critical role in the aerodynamic properties of the airfoil; it allows for differential pressure on the upper and lower surfaces of the wing during flight. This pressure difference is what ultimately leads to lift.

In the context of aviation and aerodynamics, an understanding of camber is essential for designing wings that perform efficiently at various speeds and angles of attack. Other terms, like "airfoil curvature," might generalize the concept but do not specifically define the aerodynamic principle as accurately as camber does. "Wing letting" is not a recognized term within aero-technical contexts and does not relate to airfoil design. "Lift dynamics" refers more broadly to the principles of how lift is created and affected by various factors, rather than specifying the curvature itself. Thus, camber is the most precise term for describing the curvature of an airfoil.