seaweed

noun

A plant-like organism, such as kelp, that grows in the sea.

Example sentence

“Strands of seaweed washed up on the shore after the storm.”

Uncountable: 'a strand of seaweed', not 'a seaweed'. Edible kinds appear on menus under names like kelp and nori.

Related words

tundraA cold, flat Arctic landscape where no trees grow.seashellThe hard outer covering left behind by a sea creature such as a clam or snail.savannaA hot grassland ecosystem with scattered trees whose tops do not form a closed canopy.coralA small sea animal of the class Anthozoa that lives in colonies and usually builds a hard chalky skeleton; also the colony such animals form.grasslandA large open area of land covered mostly by grass.reefA ridge of rock, coral, or sand lying just below or at the surface of the sea.