Definition of nano- 

1 : one billionth (10−9) part of nanosecond

2 : nanotechnology nanomachine

3 : nanoscale nanoparticle nanotube

History and Etymology for nano-

International Scientific Vocabulary, from Greek nanos dwarf

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English Language Learners Definition of nano-

: one billionth part of something

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Britannica English: Translation of nano- for Arabic Speakers

Britannica.com: Encyclopedia article about nano-

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