ovoid

This term is more technical and precise than the common word egg-shaped. It is frequently employed in geology, biology, and architecture to describe an asymmetrical curvature that is rounded but not perfectly spherical. It suggests a specific geometric tension where one end is typically broader than the other. While an oval is a general mathematical ellipse, ovoid implies a three-dimensional volume. Using ovoid instead of oval signals a shift from a flat, two-dimensional drawing to a physical, tactile object with depth and mass.