wave base

English

Noun

wave base (plural wave bases)

1. (geography) The lowest depth at which waves have an effect on the sediment of the sea bed. [from 19th c.]
   • 2022, Thomas Halliday, Otherlands, Penguin, published 2023, page 253:

     Beneath the wave base, the floor of the seabed is flat, disturbed only by burrowers.