[v. tes-uh-leyt; adj. tes-uh-lit, -leyt]
verb (used with object), tessellated, tessellating.
to form of small squares or blocks, as floors or pavements; form or arrange in a checkered or mosaic pattern.

1785–95; < Latin tessellātus mosaic, equivalent to tessell(a) small square stone (diminutive of tessera tessera) + -ātus -ate1

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World English Dictionary
tessellate (ˈtɛsɪˌleɪt)
1.  (tr) to construct, pave, or inlay with a mosaic of small tiles
2.  (intr) (of identical shapes) to fit together exactly: triangles will tessellate but octagons will not
[C18: from Latin tessellātus checked, from tessella small stone cube, from tessera]

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Example sentences
Have students make predictions about which shapes will tessellate.
Under the drawings, describe which of the polygons tessellate.
Given the following polygons, demonstrate how each would tessellate a plane.
Given a regular hexagon, using transformations, tessellate the original shape to make a new tile pattern.
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