polyhedron

As a noun polyhedron

is (geometry) a solid figure with many flat faces and straight edges.

As an adjective polygonal is

having many angles; hence characteristic of a polygon.

Polyhedron is a hyponym of simplex.

As nouns the difference between simplex and polyhedron

is that simplex is an analogue in any dimension of the triangle or tetrahedron: the convex hull of n+1 points in n-dimensional space while polyhedron is a solid figure with many flat faces and straight edges.

As an adjective simplex

is single, simple; not complex.

Polygonnet is likely misspelled.

Polygonnet has no English definition.

As a noun polyhedron is

a solid figure with many flat faces and straight edges.

In geometry terms the difference between pyramid and polyhedron

is that pyramid is a solid with triangular lateral faces and a polygonal (often square or rectangular) base while polyhedron is a solid figure with many flat faces and straight edges.

As nouns the difference between pyramid and polyhedron

is that pyramid is an ancient massive construction with a square or rectangular base and four triangular sides meeting in an apex, such as those built as tombs in Egypt or as bases for temples in Mesoamerica while polyhedron is a solid figure with many flat faces and straight edges.

As a verb pyramid

is to combine (a series of genes) into a single genotype.

is likely misspelled.

has no English definition.

As a noun polyhedron

is a solid figure with many flat faces and straight edges.

As nouns the difference between polyhedron and polyhedrin

is that polyhedron is (geometry) a solid figure with many flat faces and straight edges while polyhedrin is (protein) a protein that forms the crystalline matrix of viral polyhedral bodies.

As nouns the difference between taxonomy and polyhedron

is that taxonomy is the science or the technique used to make a classification while polyhedron is (geometry) a solid figure with many flat faces and straight edges.

As nouns the difference between polyhedron and scalenohedron

is that polyhedron is (geometry) a solid figure with many flat faces and straight edges while scalenohedron is a rhombohedral polyhedron having twelve sides, each in the form of a scalene triangle.

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

is that polyhedron is (geometry) a solid figure with many flat faces and straight edges while hemicube is (geometry) an abstract regular polyhedron containing half the faces of a cube.

As nouns the difference between polyhedron and hemicube

is that polyhedron is (geometry) a solid figure with many flat faces and straight edges while hemicube is (geometry) an abstract regular polyhedron containing half the faces of a cube.

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

is that polyhedron is (geometry) a solid figure with many flat faces and straight edges while isohedral is (geometry) describing a polyhedron or a tiling all of whose faces are the same.

As a noun polyhedron

is (geometry) a solid figure with many flat faces and straight edges.

As an adjective isohedral is

(geometry) describing a polyhedron or a tiling all of whose faces are the same.