Meanings
proper noun
- cellular automataAn elementary cellular automaton based on the exclusive-or function.
Origin
So named because 90 is the rule's Wolfram code.
Full word history & related roots →Cite this entry
APA
Rule 90. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Rule%2090
MLA
“Rule 90.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Rule%2090. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “Rule 90,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Rule%2090.
Source: Rule 90 on Wiktionary, CC BY-SA 4.0.