pentomino

Definition

A polyomino made up of five square units. When packing pentominoes into three-dimensional shapes, the square units commonly are expanded into cubes instead of being flattened.

Etymology

From pent- + -omino.

Example Sentences

• "If a domino had four squares on its surface, it would be a tetromino. With five squares, it would be a pentomino—nine, a nonomino, eleven, an unwieldy undecomino!"