What is the symmetrical shape of boat aeroplane called?

The symmetrical shape of a boat or airplane is commonly referred to as a "hydrofoil" for boats and an "airfoil" for airplanes. An airfoil is designed to generate lift when air flows over its shape, while a hydrofoil serves a similar function in water, allowing the vessel to lift above the surface for reduced drag. These shapes are crucial in enhancing performance and efficiency in their respective mediums.