Symbol Å. A unit of length equal to 10−10 metres. It was formerly used to measure wavelengths and intermolecular distances but has now been replaced by the nanometre. 1 Å=0.1 nanometre. The unit is named after A. J. Ångström.
Astronomy
A unit of length equal to 10−10 m. It was used mainly for specifying the wavelength of radiation, but has been replaced by the nanometre (nm). One angstrom is 0.1 nm. It is named after A. J. Ångström.
Chemistry
A unit of length equal to 10-10 metre. It was formerly used to measure wavelengths and intermolecular distances but has now been replaced by the nanometre. 1 Å = 0.1 nanometre. The unit is named after A. J. Ångström.
Biology
Symbol Å. A unit of length equal to 10−10 metre. It was formerly used to measure wavelengths and intermolecular distances but has now been replaced by the nanometre. 1 Å = 0.1 nanometre. The unit is named after the Swedish pioneer of spectroscopy A. J. Ångstrom (1814–74).