kelp

noun

ˈkelp 

plural kelps or kelp

1

a

: any of various large marine brown algae that are large seaweeds (order Laminariales) growing in cool waters

Only canopy-forming kelp are visible on the sea surface.

—Glenn Scherer

Kelps grow fast, drawing on all the minerals and vitamins and nutrients they can from the watershed and the sun.

—Zachariah Bryan

… thickets of kelp forming submarine forests in the bay.

—Jeff Phillips

see also bladder kelp, bull kelp, giant kelp

b

: a mass or growth of large seaweeds

The kelp near the outer islands teems with marine plants and animals in far greater abundance than it does closer to the coast …

—John L. Stein

2

a

: a blade (see blade entry 1 sense 2e) of kelp that is usually dried and used as food (as in sushi or soups)

b

: a dietary supplement containing processed kelp

c

: the ashes of seaweed used formerly especially as a source of iodine

Examples of kelp in a Sentence

Recent Examples on the Web

Earlier this year, researchers found that gray whales were avoiding the Oregon coast due to a drastic increase in sea urchins that have been depleting local kelp forests. —Meira Gebel, Axios, 4 Oct. 2024

The council also approved funding for routine beach maintenance in South Laguna to include weekly sweeping of the parking lots at Aliso Beach, staircase maintenance at other beaches, and weekly beach grooming, which consists of removing kelp and debris from the sand. —Erika I. Ritchie, Orange County Register, 17 May 2024

Research has also shown seaweed such as kelp isn’t a static vessel filled with CO2. —Bywarren Cornwall, science.org, 29 Aug. 2024

The area, which includes popular spots such as Pismo Beach and the Gaviota Coast, is home to humpback whales, sea otters, leatherback sea turtles, kelp forests, rocky reefs and more than 200 shipwrecks. —Paul Rogers, The Mercury News, 6 Sep. 2024

Word History

Etymology

Middle English culp

First Known Use

14th century, in the meaning defined at sense 1a

Phrases Containing kelp

• bladder kelp
• bull kelp
• giant bladder kelp
• giant kelp
• kelp bass

Kids Definition

kelp

noun

ˈkelp 

: any of various large brown seaweeds

also : a mass of these

Medical Definition

kelp

noun

ˈkelp 

1

: any of various large marine brown algae that are large seaweeds (order Laminariales) growing in cool waters

2

a

: a dietary supplement containing processed kelp

b

: the ashes of seaweed used formerly especially as a source of iodine