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Definition of Spacefiller
1. Noun. (philately) A 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. ¹
2. Noun. (context: cellular automata) A pattern that grows quadratically by filling space with still life. ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Spacefiller
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