W
Wetting angle
When a liquid droplet is placed on the surface of another material, the wetting angle refers to the tangential angle between the base and the surface of the droplet. The larger the angle is the lower is the wettability. This basically refers to the ability to adhere with other materials.
Y
Young’s modulus
Tensile modulus on normal stress and normal strain.
Z
Zero cut (Spring cut)
Zero cut (Spring cut) is an operation to recut a component at a zero depth of cut.