A transverse leaf spring is a semi-elliptical spring positioned laterally on the vehicle's frame.
It is mounted upside down, with a saddle above the axle, creating a bow-like form.
This spring is installed parallel to the wheel axle, bearing the vehicle's load and enabling controlled motion.
Transverse springs are prevalent in older suspension designs and are used in certain modern vehicles for space efficiency.
Other spring types like full elliptical, quarter elliptical, or semi-elliptical springs are installed differently and do not fit this sideways inverted configuration.
Consequently, the accurate term is transverse.