tessellate

verb (used with object), tes·sel·lat·ed, tes·sel·lat·ing.

1. to form of small squares or blocks, as floors or pavements; form or arrange in a checkered or mosaic pattern.

adjective

2. tessellated.

verb

1. (tr) to construct, pave, or inlay with a mosaic of small tiles
2. (intr) (of identical shapes) to fit together exactlytriangles will tessellate but octagons will not