Definition of nano- in English:

nano-

Pronunciation /ˈnanō/ /ˈnænoʊ/

  • 1Denoting a factor of 10⁻⁹ (used commonly in units of measurement)

    ‘nanosecond’
    1. 1.1Denoting a very small item.
      ‘nanoplankton’

Origin

Via Latin from Greek nanos ‘dwarf’.

Pronunciation

nano-

/ˈnanō/ /ˈnænoʊ/