The term "hull" refers to the main body of a ship or boat, which provides the structure and shape necessary for floating and navigating in water. It is designed to withstand the forces of waves and currents while keeping the vessel stable. The hull can be made from various materials, including wood, metal, and fiberglass, depending on the type of vessel and its intended use. In addition to ships, the term "hull" can also refer to the outer covering of certain fruits and seeds, such as sunflower seeds or hazelnuts. In this context, the hull serves as a protective layer, safeguarding the inner edible parts from environmental factors and pests.