nano-
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nano-: pref.

  [SI: the next quantifier below micro-; meaning `× 10-9`] Smaller than micro-, and used in the same rather loose and connotative way. Thus, one has nanotechnology (coined by hacker K. Eric Drexler) by analogy with microtechnology; and a few machine architectures have a nanocode level below microcode. Tom Duff at Bell Labs has also pointed out that “Pi seconds is a nanocentury”. See also quantifiers, pico-, nanoacre, nanobot, nanocomputer, nanofortnight.

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