(tan-jen -shăl) (transverse velocity) See proper motion.
tangential velocity
[tan′jen·chəl və′läs·əd·ē] (mechanics) The instantaneous linear velocity of a body moving in a circular path; its direction is tangential to the circular path at the point in question.The component of the velocity of a body that is perpendicular to a line from an observer or reference point to the body.