wave locus

a. disturbance traveling through a medium—water, light, sound; b. moving ridge on the sea; c. gesture of the hand; d. surge or oscillation.

Getty AAT: Movements in the sea or other collection of water, by which a portion of the water rises above the normal level and then subsides, at the same time travelling over the surface; a moving ridge or swell of water between two depressions or troughs. (AAT 300343616)