periodic motion
periodic physical motion in which position oscillates
tidal current
oscillating currents produced by tides
simple harmonic motion
to and fro periodic motion in science and engineering
tide
rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of the Earth
vibration
mechanical phenomenon whereby oscillations occur about an equilibrium point; precisely used to describe mechanical oscillation
molecular vibrations
periodic motion of the atoms of a molecule
speed wobble
rapid oscillation in primarily in steerable wheels of vehicles which can make the vehicle unstable with increasing amplitude and cause loss of control
pilot-induced oscillation
sustained or uncontrollable oscillations resulting from efforts of the pilot to control the aircraft