Definition of TessellationA tessellation is created when a shape is repeated over and over again covering a plane without any gaps or overlaps.
Another word for a tessellation is a tiling. Read more here: What is a Tiling?
A dictionary* will tell you that the word "tessellate" means to form or arrange small squares in a checkered or mosaic pattern. The word "tessellate" is derived from the Ionic version of the Greek word "tesseres," which in English means "four." The first tilings were made from square tiles.
A regular polygon has 3 or 4 or 5 or more sides and angles, all equal. A regular tessellation means a tessellation made up of congruent regular polygons. [Remember: Regular means that the sides of the polygon are all the same length. Congruent means that the polygons that you put together are all the same size and shape.
Source:
http://mathforum.org
Click Here for More Information about the Tessellation
