kelp.

Large brown seaweed, often forming dense underwater growth in cool coastal water.

Use it for

Words that belong together

• kelp forest
• kelp fronds
• washed-up kelp

On the page

Kelp swayed below the boat.

The tide left ropes of kelp across the stones.

Otters floated at the edge of the kelp forest.

Usage notes

Primary category: environment. A group of seaweeds, not a synonym for all marine vegetation. Usually mass or collective; kelps for species or kinds.