thumb|300px|Schematic representation of difference in grain shape. Two parameters are shown: sphericity (vertical) and Roundness (geology)|rounding (horizontal).
thumb|300px|Schematic representation of difference in grain shape. Two parameters are shown: sphericity (vertical) and Roundness (geology)|rounding (horizontal).
Sphericity is a measure of how closely the shape of a physical object resembles that of a perfect sphere. For example, the sphericity of the balls inside a ball bearing determines the quality of the bearing, such as the load it can bear or the speed at which it can turn without failing. Sphericity is a specific example of a compactness measure of a shape.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).