Word.ws English Dictionary

gray goo

gray goo is the alternative spelling of grey goo.

Meaning of grey goo

Noun

grey goo (uncountable)

  1. 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).
    • "Our first priority has to be quarantining Xinchub's body, and examining any Yomingians who may have handled it. I don't think we're headed for a grey-goo scenario here, but we'd all feel really bad if the local biosphere got consumed by nanobots after we left."2007 August 24, Howard Tayler, Schlock Mercenary, archived from the original on 11 May 2024

Questions about gray goo

What is gray goo the alternative spelling of?
Gray goo is the alternative spelling of grey goo.

Words near gray goo in the dictionary

  1. gray friar
  2. gray friars
  3. gray ghost
  4. gray ghosts
  5. gray gold
  6. gray goo
  7. gray ground squirrel
  8. gray ground squirrels
  9. gray hat
  10. gray hats
  11. gray hen

Source and license

Adapted from Wiktionary: gray goo (page history and authors); grey goo (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “gray goo.” Word.ws, https://word.ws/gray_goo. Based on Wiktionary, CC BY-SA 4.0.