Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun An SI subunit of length equal to 10-9 metres. Symbol: nm

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a metric unit of length equal to one billionth of a meter

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

nano- +‎ metre

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