ˈkelp, ˈkeu̇p noun
( -s )
Etymology: Middle English culp
1.
a. : any of various large brown seaweeds of the orders Laminariales and Fucales — see giant kelp
b. : a mass or growth of large seaweeds ; especially : a mass of those burned for the ashes
2. also kelp ash : the ashes of seaweed used formerly as a source of alkali and now as a source of iodine