seaweed

noun

Etymology: Etymology tree English sea Proto-West Germanic *weud Old English wēod Middle English weed English weed English seaweed From sea + weed.

1. Any of numerous marine algae, such as a kelp.

   “We have lingered in the chambers of the sea / By sea-girls wreathed with seaweed red and brown / Till human voices wake us, and we drown.”

   “The tide was out, and we drew up amid the strong bracing smell of seaweed, with gulls screeching, wheeling around, and gliding on the wind.”

2. Any of various fresh water plants and algae.

   “With light penetrating to the lake bottom, beds of seaweed flourished where little had grown before.”