I would call it an elliptical spheroid, I think. An ellipse would be the closest 2D term though.
It's an ovoid, not an ellipsoid as some may think.
In science, a three-dimensional oval is called an ovoid. Less formally, a three-dimensional oval shape is called an egg.
Pentacontakaihedron.
Many 3d shapes have a corner.
Its an eqaulateral tringle
The shape of an egg.
There is no specific name. There are spheres, ellipsoids, paraboloids, etc. Then there are 3-d cycloids,
It's an ovoid, not an ellipsoid as some may think.
No shape is mathematical really unless it has been created by a mathematical formula, but is certainly a geometric shape. But anything which is a 2D or 3D shape is geometric. My improvement: A catenary curve from a mathematical equation such as cosh x, is a mathematical and natural shape. Maby each other arch can be approximated by a mathematical formula.
Egg
A hexahedron is the name for a 6 sided 3D shape.
A nonagon is a 2D shape and there is not a 3D equivalent shape.
the name of a 20 sided 3d shape is called a icosahedron
a 3d oval is called an ovoid and it looks like a type of egg
A cube is a 3D shape with a top and bottom.
Ellipsoid, Ovoid, Prolate Spheroid, Spheroid
In science, a three-dimensional oval is called an ovoid. Less formally, a three-dimensional oval shape is called an egg.