noun
washed-up seaweed; stranded seaweed
Seaweed that has been washed ashore or is drifting near the shore.
台風の後、海岸に寄り藻がたくさん打ち上げられていた。
After the typhoon, a lot of washed-up seaweed had been cast up on the beach.
Compound of 寄り (yori, 'approaching, drifting in') + 藻 (mo, 'seaweed').