wave![click to hear](/images/speaker.jpg)
Undulation caused by the wind on the surface of a sea or lake.
wave base ![click to hear](/images/speaker.jpg)
Maximum depth beneath which wave action is no longer perceptible.
still water level ![click to hear](/images/speaker.jpg)
Level of the water surface in the absence of waves.
trough ![click to hear](/images/speaker.jpg)
Lowest point of the wave.
sand bar ![click to hear](/images/speaker.jpg)
Accumulation of sediment at the bottom of the sea, close to the shoreline; it is sometimes exposed at low tide.
foam ![click to hear](/images/speaker.jpg)
Whitish froth that forms on the water surface when a wave breaks.
shore ![click to hear](/images/speaker.jpg)
Strip of land where the sea meets the land.
breaker ![click to hear](/images/speaker.jpg)
High wave that breaks on the coast.
wave length ![click to hear](/images/speaker.jpg)
Horizontal distance between two successive crests or troughs.
crest ![click to hear](/images/speaker.jpg)
The highest point of a wave.
wave height ![click to hear](/images/speaker.jpg)
Vertical distance between the crest and the trough.