irregular prism

Definitions

1. 1

   a prism whose cross section is an irregular polygon

   • A right prism, having regular polygons for its terminating planes, is said to be regular ; an irregular prism is one in which the ends are irregular polygons.
   • If the base be an irregular polygon of any number of sides, the prism is then called an irregular prism.
2. 2

   a solid that is like a prism but whose cross section is not (necessarily) a polygon

   • If the base be a triangle, it is called a triangular prism; if a square, a square prism; if a pentagon, a pentagonal prism; and' if the base is any irregular figure, it is called an irregular prism : ...
   • Irregular prisms have a cross-section with no well known shape. Some of the steel sections used in the construction industry belong to this category.

The neighborhood