Definition of nanobot
: a microscopically small robot : a robot built on the scale of nanometers Many newspaper articles about nanotechnology seem obsessed with the idea of nanobots, itty bitty robots that dash about doing useful tasks and maybe (just maybe) getting out of control and destroying the world …— Pat Murphy Another technology that will greatly enhance the realism of virtual reality is nanobots: miniature robots the size of blood cells that travel through the capillaries of our brains and communicate with biological neurons.— Ray Kurzweil In one section of the book, [Eric] Drexler speculates about what could happen if we created self-reproducing "nanobots."— Keith Veronese
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