Definition of nano- in English:

nano-

Syllabification: nano-

combining form

1Denoting a factor of 10−9 (used commonly in units of measurement): nanosecond
1.1Denoting a very small item: nanoplankton

Origin

via Latin from Greek nanos 'dwarf'.

Definition of nano- in:

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Word of the day apposite
Pronunciation: ˈapəzɪt
adjective
apt in the circumstances or relation to something