semiregular

adjective3

1. •
   Somewhat regular; occasional.

   • Although Lester must still see doctors on a semiregular basis for checkups, his health has returned to normal. — 2007
2. •
   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.

   • It will be seen below that this semiregular polyhedron is of importance in its relationship to periodic minimal surfaces serving as a conceptual reference. — 1993
3. •
   Whose regular open sets form a base.

   • A space is semiregular iff the regularly open sets (3D) form a base for the topology.[…]Every space X can be embedded in a semiregular space. — 1970