spacefiller

plural spacefillers

1. hobbiesA stamp in poor condition used to fill a space in an album until a better quality example becomes available, or if the better example is prohibitively expensive.
2. cellular automataA pattern that grows quadratically by filling space with still life.

   Spacefiller patterns might possibly even be within reach of current search programs; these would have much more predictable (and higher) growth rates from the start.

   2008 May 31, Dave Greene, “Life: B37/S23 - A Chaotic Universe.”, in comp.theory.cell-automata (Usenet)

   1 more example

   Other things that can be built (I see no reason why not) are a self-replicator, quadratically growing spacefiller, programmable computer/constructor, self-growing prime number sieve.

   2009 December 16, Mark Jeronimus, “WireWorld Extendable 3”, in comp.theory.cell-automata (Usenet)