semiregular

Adjective

 * 1) Somewhat regular; occasional.
 * 2)  Whose regular open sets form a base.
 * 3)  Uniform (isogonal and isotoxal) with regular faces of two or more types, such that each vertex is surrounded by the same polygons in the same order.
 * 1)  Uniform (isogonal and isotoxal) with regular faces of two or more types, such that each vertex is surrounded by the same polygons in the same order.
 * 1)  Uniform (isogonal and isotoxal) with regular faces of two or more types, such that each vertex is surrounded by the same polygons in the same order.

Usage notes

 * In geometry, usage is sometimes inconsistent. In regard to 3-dimensional polyhedra, convexity is often implicitly assumed, and the infinite classes of prisms and antiprisms may also be omitted, leaving just the Archimedean solids. Conversely, others choose the path of inclusion, admitting figures such as certain nonconvex (but still uniform), as well as the duals of all included polyhedra. (See )