the product of the momentum of a rotating body and its distance from the axis of rotation
"any rotating body has an angular momentum about its center of mass"
"angular momentum makes the world go round"
The vector product that describes the rotary inertia of a system about an axis and is conserved in a closed system. For an isolated rigid body, it is a measure of the extent to which an object will continue to rotate in the absence of an applied torque.