also: テトラポット
noun
tetrapod; concrete breakwater block
A tetrahedral concrete structure used in coastal engineering to dissipate wave energy and prevent erosion. Often seen along shorelines and harbor breakwaters.
See also: 消波ブロック
海岸にテトラポッドが並んでいる。
Tetrapods are lined up along the shore.
テトラポッドは波
Tetrapods are used to reduce the force of waves.