A mechanism in the truck of a railway carriage, etc., permitting swaying from side to side.

(politics) Synonym of vote of no confidence / (politics, informal) A regular motion that serves as an informal indicator of confidence in the current leader or government.

Synonym of motion sickness

(physics) An equation that describes the behavior of a physical system in terms of its motion as a function of time.

plural of equation of motion

Resembling or relating to slow motion. / Having the use of slow motion in film for increased, emotional impact. / When a dramatic scene is in slow motion.

plural of motion capture

(astronomy) The apparent westward rotation of the celestial sphere, along with the apparent westward revolution of celestial objects, around the celestial poles due to prograde (eastward) rotation of planet Earth relative to the seemingly fixed stars – completed once each sidereal day (about 23 hours, 56 minutes, 4 seconds).

(photography, optics) The apparent motion of a tracking-locked foreground object against a background, when the camera is moving across the environment. (ie. A stationary object will appear to move across a background, when a moving camera is locked to track it)

(photography, optics) The illusion of higher speed travel of a foreground object moving, when it is closer to the observer/camera, than when it is further away.