angstrom

¹

[ang-struhm]

noun

(often initial capital letter)

1. a unit of length, equal to one tenth of a millimicron, or one ten millionth of a millimeter, primarily used to express electromagnetic wavelengths. Å; A

Ångström

²

[ang-struhm, awng-strœm]

noun

1. Anders Jonas 1814–74, Swedish astronomer and physicist.

Ångström

¹

/ ˈæŋstrəm, ˈɔŋstrœm /

noun

1. Anders Jonas (ˈandərs ˈjuːnas). 1814–74, Swedish physicist, noted for his work on spectroscopy and solar physics

angstrom

²

/ ˈæŋstrʌm, -strəm /

noun

1. Å.  A. 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 nanometre

Ångström

¹

1. 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.

angstrom

²

1. 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.

Word History and Origins

Origin of Ångström¹

First recorded in 1895–1900; named after A. J. Ångström ( def. )

Word History and Origins

Origin of Ångström¹

C20: named after Anders J. _Ångström