kelp
Americannoun
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any large, brown, cold-water seaweed of the family Laminariaceae, used as food and in various manufacturing processes.
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a bed or mass of such seaweeds.
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the ash of these seaweeds.
verb (used without object)
noun
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any large brown seaweed, esp any in the order Laminariales
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the ash of such seaweed, used as a source of iodine and potash
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Any of various brown, often very large seaweeds that grow in colder ocean regions. Kelps are varieties of brown algae of the order Laminariales, with some species growing over 61 m (200 ft) long. Kelps are harvested as food (primarily in eastern Asia), as fertilizer, and for their sodium and potassium salts, used in industrial processes. Kelps are also a source of thickening agents and colloid stabilizers used in many commercial products.
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See more at brown alga
Etymology
Origin of kelp
1350–1400; apparently dialectal variant of Middle English culp < ?
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.