Definition of kelp in English:



  • 1[mass noun] A large brown seaweed that typically has a long, tough stalk with a broad frond divided into strips.

    ‘a large bed of kelp’
    [count noun] ‘there are several kelps found in the lower zones’
    • ‘These delicate fish are poor swimmers, but use their leaf-like appendages to help them blend into the algae and kelp surrounding them for protection from predators.’
    • ‘Octopus bimaculatus lives in holes, under rocks and among kelps and is found in the Pacific waters around California and Mexico.’
    • ‘Below us the seabed was strewn with small boulders and overgrown with beds of brown kelp.’
    • ‘In aquatic habitats, bryozoans may be found on all types of hard substrates: sand grains, rocks, shells, wood, and blades of kelps and other algae may be heavily encrusted with bryozoans.’
    • ‘As it swims over different areas of seabed, a cuttlefish can change colour almost instantly to match its surroundings, taking on a dark brown shade over kelp and turning almost white over sand.’
    • ‘In terms of biomass, organic carbon fixation, space occupation, and biogenic habitat, kelps are the dominant reef-inhabiting organisms in cool seas, especially in the Northern Hemisphere.’
    • ‘And our southern waters are incredibly diverse with beautiful sea dragons and hand fish and over a 1000 different varieties of colourful kelp and algae and amazing fish.’
    • ‘The elimination of sea otters for their pelts allowed explosions of sea urchins that ate all the kelps.’
    • ‘Other chromists, such as the large kelps, are attached to the bottom of the ocean, but are so incredibly large that they may reach to the surface, and form kelp forests in the ocean.’
    • ‘Two wholesome brown kelps that are popular among Japanese diners are kombu and arame.’
    • ‘Unlike kelp and other seaweed, sea grasses are descended from terrestrial plants, which adapted to shallow non-rocky coastal waters.’
    • ‘Other commonly used seaweeds are wakame and kombu, which are types of kelp.’
    • ‘Giant kelp and seaweed are common, especially in intertidal zones.’
    • ‘Many large kelps use gas-filled floatation bladders to keep their large blades near the surface, and therefore in the light.’
    • ‘By devising experiments with and without herbivores, they were able to observe the maximum effect of herbivores on small kelps.’
    • ‘Apart from algae, perhaps we can also bioengineer seaweed or kelp for the same purpose in aquatic fuel farms.’
    • ‘Flocks of terns and cormorants fished offshore, while fronds of kelp writhed in the surf like the flailing arms of sea monsters.’
    • ‘The valued molluscs are fed hand-harvested kelp and some compounded seaweed diet, and are graded at regular intervals over the farming period of 36 to 40 months.’
    • ‘The sea bed was covered by fronds of kelp which swayed to and fro in the water, grabbing our legs as we began our course around the pier's outer edge.’
    • ‘You may also want to eat iodine-rich foods like kelp, nori, and other seaweeds as often as once a day, and fish and shellfish two or three times a week.’
    1. 1.1The calcined ashes of seaweed, used as a source of various salts.
      • ‘I apply an organic fertilizer high in trace elements and kelp.’


Late Middle English: of unknown origin.