grey goo

== English == === Alternative forms === gray goo (chiefly US) === Etymology === Coined by American engineer K. Eric Drexler in 1986 in Engines of Creation. === Noun === grey goo (uncountable) 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). ==== Further reading ==== grey goo on Wikipedia.Wikipedia