Kelp definitions

kĕlp
Any of various brown seaweeds of the order Laminariales, often growing very large and forming dense beds.
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The ashes of seaweed, formerly used as a source of potash and iodine.
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Any of an order (Laminariales) of large, coarse, brown algae.
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Ashes of seaweed, from which iodine is obtained.
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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 CELP.
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Any of several large brown seaweeds (order Laminariales).
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The calcined ashes of seaweed, formerly used in glass and iodine manufacture.
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Origin of kelp

Middle English culp