The term "hemispherical" refers to a shape that is half of a sphere. This means it has a curved surface that is smooth and rounded, resembling the top half of a ball. Hemispherical objects can be found in various contexts, such as in architecture, where domes may take on this shape, or in science, where hemispherical lenses are used in optics. In mathematics, a hemispherical shape can be described using geometric principles. The volume and surface area of a hemisphere can be calculated using specific formulas. Hemispherical structures are also significant in fields like astronomy, where they can represent celestial bodies or models of the Earth, such as in the context of the globe.