Groin (British, Groyne)
Groin (British, Groyne) : Narrow, roughly shore-normal structure built to reduce longshore currents, and/or to trap and retain littoral material. Most groins are of timber or rock and extend from a SEAWALL, or the backshore, well onto the foreshore and rarely even further offshore. See: T-Groin, Permeable Groin, Impermeable Groin
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