- any of an order (Laminariales) of large, coarse, brown algae
- ashes of seaweed, from which iodine is obtained
Origin of kelpMiddle English culp
- Any of various brown seaweeds of the order Laminariales, often growing very large and forming dense beds.
- The ashes of seaweed, formerly used as a source of potash and iodine.
Origin of kelpMiddle English culp.