Sphericity is a measure of how closely the shape of an object resembles a perfect sphere. It is often used in fields like geology, biology, and engineering to assess the roundness of particles or objects. A perfectly spherical object has a sphericity value of 1, while irregular shapes have lower values, indicating deviations from a sphere. In practical applications, sphericity can influence how materials behave in processes such as sedimentation or fluid dynamics. For example, in sedimentology, the sphericity of sediment particles affects their transport and deposition in natural environments, impacting ecosystem dynamics and soil formation.