1. a unit of length equal to one ten-billionth of a meter, used especially to measure wavelengths of light and atomic dimensions
Usage: scientific

Examples

• The wavelength of blue light is about 4500 angstroms.
• Scientists measure atomic radii in angstroms.
• X-rays have wavelengths of less than 10 angstroms.
• The angstrom is named after Swedish physicist Anders Jonas Ångström.
• Crystal structures are often described using measurements in angstroms.
• Visible light ranges from about 4000 to 7000 angstroms in wavelength.