tessellating

/T EH1 S AH0 L EY0 T IH0 NG/
verb
  1. 1

    To cover with tiles or stones, as a mosaic; to tile.

  2. 2

    Of a two-dimensional shape, such that multiple copies of itself placed edge to edge cover an area leaving no space between the shapes.

  3. 3

    To completely fill (an area) when multiple copies of one or more two-dimensional shapes are placed edge to edge.

Source: https://en.wiktionary.org/wiki/tessellate, https://en.wiktionary.org/wiki/tessellating