gray goo

A form of grey goo — A hypothetical end-of-the-world event involving nanotechnology, in which out-of-control self-replicating nanobots consume all life on Earth (or another planet or moon).

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Meanings

noungray goo (uncountable)
  1. alternativeuncountableAlternative spelling of grey goo.
Cite this entry
APA

gray goo. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/gray%20goo

MLA

“gray goo.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/gray%20goo. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “gray goo,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/gray%20goo.

Source: gray goo on Wiktionary, CC BY-SA 4.0.