intersphere

Midsphere is a synonym of intersphere.

As a noun intersphere is

(geometry) a sphere that is tangent to every edge of a given polyhedron.

In geometry|lang=en terms the difference between polyhedron and intersphere

is that polyhedron is (geometry) a solid figure with many flat faces and straight edges while intersphere is (geometry) a sphere that is tangent to every edge of a given polyhedron.

As nouns the difference between polyhedron and intersphere

is that polyhedron is (geometry) a solid figure with many flat faces and straight edges while intersphere is (geometry) a sphere that is tangent to every edge of a given polyhedron.

As nouns the difference between edge and intersphere

is that edge is the boundary line of a surface while intersphere is (geometry) a sphere that is tangent to every edge of a given polyhedron.

As a verb edge

is to move an object slowly and carefully in a particular direction.

In geometry|lang=en terms the difference between tangent and intersphere

is that tangent is (geometry) touching a curve at a single point but not crossing it at that point while intersphere is (geometry) a sphere that is tangent to every edge of a given polyhedron.

As nouns the difference between tangent and intersphere

is that tangent is (geometry) a straight line touching a curve at a single point without crossing it there while intersphere is (geometry) a sphere that is tangent to every edge of a given polyhedron.

As an adjective tangent

is (geometry) touching a curve at a single point but not crossing it at that point.

As nouns the difference between sphere and intersphere

is that sphere is sphere while intersphere is (geometry) a sphere that is tangent to every edge of a given polyhedron.