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Noun: nanometer  'na-nu,mee-tur
Usage: US (elsewhere: nanometre)
  1. A metric unit of length equal to one billionth of a meter
    "The thickness of the coating was 50 nanometers";
    - nanometre [Brit, Cdn], nm, millimicron [Brit], micromillimeter [US], micromillimetre [Brit, Cdn]

Derived forms: nanometers

Type of: metric linear unit

Part of: micrometer[2] [US], micrometre [Brit, Cdn], micron

Encyclopedia: Nanometer