from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A unit of length equal to one hundred-millionth (10-8) of a centimeter, used especially to specify radiation wavelengths. Also called angstrom unit. See Table at measurement.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A very small unit of length, 10-10 m, approximately the size of an atom, used especially to measure the wavelength of electromagnetic radiation or distances between atoms. Symbol Å
After Anders Jonas Ångström.(American Heritage® Dictionary of the English Language, Fourth Edition)
From the name of the Swedish physicist Anders Jonas Ångström. (Wiktionary)