gravity wave

noun

1. Astronomy, Physics. gravitational wave.
2. a wave created by the action of gravity on local variations in the density of a stratified fluid, as the atmosphere, or at an interface between fluids of different density, as a liquid and a gas.

noun physics

1. a wave propagated in a gravitational field, predicted to occur as a result of an accelerating mass
2. a surface wave on water or other liquid propagated because of the weight of liquid in the crests