noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A unit of length equal to 10⁻¹⁰ meters (that is, one ten-billionth of a meter), approximately the size of an atom, and denoted by the symbol Å, used especially to measure the wavelength of electromagnetic radiation or distances between atoms.
2. 2
   Alternative letter-case form of ang­strom. alt-of, countable, uncountable
3. 3
   a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation wordnet

Synonyms

All synonyms

angstrom unitaauÅ㍳

Etymology

Borrowed from Swedish ångström, named after Swedish physicist Anders Jonas Ångström.

Related phrases

angstrom starelectromagnetic radiation

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.