定てい着ちゃく氷ひょう

noun

fast ice

Technical term in oceanography and glaciology for sea ice that is attached to the coastline, sea floor, or grounded icebergs and does not move with currents or winds.

• 南なん極きょくの沿えん岸がんでは、冬ふゆになると広こう範はん囲いに定てい着ちゃく氷