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Noun: angstrom  ang-strum
  1. A metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
    "The wavelength of visible light ranges from 4000 to 7000 angstroms";
    - angstrom unit, A

Derived forms: angstroms

Type of: metric linear unit

Part of: micromillimeter [US], micromillimetre [Brit, Cdn], millimicron [Brit], nanometer [US], nanometre [Brit, Cdn], nm

Encyclopedia: Angstrom