Source : Webster's Revised Unabridged Dictionary (1913)

Groyne \Groyne\, n. [Obs.]
   See {Groin}.

Source : WordNet®

groyne
     n : a protective structure of stone or concrete; extends from
         shore into the water to prevent a beach from washing away
         [syn: {breakwater}, {groin}, {mole}, {bulwark}, {seawall},
          {jetty}]