angstrom

views updated May 18 2018

ang·strom / ˈangstrəm/ (also ång·ström, angstrom unit) (abbr.: Å) • n. a unit of length equal to one hundred-millionth of a centimeter, 10⁻¹⁰ meter, used mainly to express wavelengths and interatomic distances.

The Oxford Pocket Dictionary of Current English

ångstrom

views updated May 08 2018

ångstrom (Å) Unit of length equal to 10₋₁₀ m, used in measuring electromagnetic radiation including visible light and X-rays. Replaced in SI units by the nanometre (10 Å = 1 nm).

A Dictionary of Earth Sciences AILSA ALLABY and MICHAEL ALLABY

angstrom

views updated May 17 2018

angstrom (angstrom unit) (symbol Å) Obsolete unit of length, equal to 10⁻¹⁰ m or 0.1nm (nanometre). It was used to express the wavelength of light and ultraviolet radiation, and to measure distances between atoms and between molecules. The angstrom was replaced by the nanometre.

World Encyclopedia

angstrom

views updated Jun 08 2018

angstrom 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 It was formerly used to measure wavelengths and intermolecular distances but has now been replaced by the nanometre. 1 Å = 0.1 nanometre.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).

A Dictionary of Biology

Ångstrom

views updated May 14 2018

Ångstrom A unit of length equal to 10⁻⁸ cm (10⁻¹⁰ m) and hence = 10 nm; not an official SI unit, but commonly used in structural chemistry and crystallography.

A Dictionary of Food and Nutrition DAVID A. BENDER

angstrom

views updated May 29 2018

angstrom (ang-strŏm) n. a unit of length equal to one ten millionth of a millimetre (10⁻¹⁰ m), sometimes used to express wavelengths and interatomic distances. Symbol Å.

A Dictionary of Nursing