noun (often initial capital letter)
- a unit of length, equal to one tenth of a millimicron, or one ten millionth of a millimeter, primarily used to express electromagnetic wavelengths. Symbol: Å; Abbreviation: A
- An·ders Jo·nas [an-derz joh-nuh s; Swedish ahn-duh rs-yoo-nahs] /ˈæn dərz ˈdʒoʊ nəs; Swedish ˈɑn dərsˈyu nɑs/, 1814–74, Swedish astronomer and physicist.
- Also called: angstrom unit a unit of length equal to 10 –10 metre, used principally to express the wavelengths of electromagnetic radiations. It is equivalent to 0.1 nanometreSymbol: Å, A
- Anders Jonas (ˈandərs ˈjuːnas). 1814–74, Swedish physicist, noted for his work on spectroscopy and solar physics
unit of length equal to one hundred millionth of a centimeter (used to measure wavelengths of light), 1892, named for Swedish physicist Anders Ångström (1814-1874).
- A unit of length equal to one hundred millionth (10-8) of a centimeter, used especially to specify radiation wavelengths.
- A unit of length equal to one hundred-millionth (10-10) of a meter. It was once used to measure wavelengths of light and the diameters of atoms, but has now been mostly replaced by the nanometer.
- Swedish physicist and astronomer who pioneered the use of the spectroscope in the analysis of radiation. By studying the spectrum of visible light given off by the Sun, Ångström discovered that there is hydrogen in the Sun’s atmosphere. The angstrom unit of measurement is named for him.