A solid ellipsoid: a sphere stretched to its own radius along X, Y and Z. The surface is exact; the field value away from it is an approximation of distance.
Center, from a wire; replaces the typed value.
Half-widths along the world X, Y and Z axes.
Values the block gives besides its output. The editor lists them under Properties, and an input can read one by reference.
The ellipsoid as a Solid.
The ellipsoid's center point.
The axis-aligned extent of the ellipsoid.
The ellipsoid's signed distance, as a field.