GNU Collaborative International Dictionary of English

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Found one definition

1.       
   Kelp (kĕlp), n. [Formerly kilpe; of unknown origin.]
   1. The calcined ashes of seaweed, -- formerly much used in the manufacture of glass, now used in the manufacture of iodine.
   
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   2. (Bot.) Any large blackish seaweed.
   
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   ☞ Laminaria is the common kelp of Great Britain; Macrocystis pyrifera and Nereocystis Lutkeana are the great kelps of the Pacific Ocean.
   
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   Kelp crab (Zool.), a California spider crab (Epialtus productus), found among seaweeds, which it resembles in color. -- Kelp salmon (Zool.), a serranoid food fish (Serranus clathratus) of California. See Cabrilla.
   
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