noun
floating pier; floating dock
A pier or dock that floats on the water, often used for small boats or in areas with changing water levels.
湖のほとりに浮き桟橋が設置されている。
A floating pier is installed at the edge of the lake.
Variant spelling without okurigana; less common but still used.
桟橋 is a general pier or wharf, while 浮き桟橋 specifically floats on the water.
Compound of 浮き (uki, 'floating') + 桟橋 (sanbashi, 'pier').