What does kelp mean?
Kelp is a term for large brown seaweeds that grow in coastal oceans and often form dense underwater forests. The word can refer both to the living plants and to harvested kelp used in cooking, agriculture, and industry. Kelp forests provide food and shelter for many marine animals, including fish, invertebrates, and sea mammals, making them among the most productive ecosystems in the ocean. The material is also a source of iodine and alginates, substances used in some foods, fertilizers, and manufactured products. In everyday contexts, kelp usually evokes marine plants, coastal landscapes, and underwater forests, though it can also refer to specific preparations such as kelp fertilizer or kelp supplements.
A large brown alga that grows in the ocean, often forming dense underwater forests; also, the harvested material made from such seaweed.
"The bay is home to extensive kelp forests."
As a countable noun, it usually refers to an individual plant or a mass of the seaweed.
To gather or harvest kelp, especially from the sea.
"The crew went kelp harvesting before the storm reached the coast."
The plural is used for individual plants or distinct examples of kelp, though the singular is also commonly used collectively for the seaweed.
"Several kelps washed up along the beach after the storm."
Kelp forests can create entire underwater ecosystems, providing shelter and food for fish, sea otters, and countless marine species.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does kelp come from?
The English word kelp appears in Middle English and is generally traced to an Old English form. Its ultimate origin is uncertain, and it has been compared with forms in other northern European languages. The word continued to develop its modern sense of a large brown seaweed alongside uses referring to dried seaweed and materials made from it.
How kelp is actually used
In ecology, kelp commonly refers to the large brown algae that form marine forests. In general use, it can also mean the harvested material used for food, fertilizer, and industrial products.
Easily confused with kelp
Kelp is a type of algae, but the term usually refers specifically to large brown seaweeds rather than the broad group of simple plantlike organisms.