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


from The American Heritage® Dictionary of the English Language, 4th Edition

After Anders Jonas Ångström.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From the name of the Swedish physicist Anders Jonas Ångström.


  • (An angstrom is one ten-billionth of a meter, the approximate diameter of a single atom.)

    Boing Boing: September 19, 2004 - September 25, 2004 Archives

  • TEAM 0.5 is capable of producing images with a resolution of one-half angstrom, which is less than the diameter of a single hydrogen atom. - latest science and technology news stories

  • In science news: I recently used the word "angstrom" in a humorous context, and many people laughed, and some people sneered (mostly engineers), and the wonderful Melissa Evans just gave me the facts, ma'am:

    SFGate: Top News Stories

  • I've never bought a jar of Hellmann's without first comparing it's per ounce, pound, angstrom unit, or whatever the applicable measurement, price to that of Kraft, Cains, etc.

    Gaming the Groceries

  • - With such capabilities, this guy could be an ultimate multilinguist if there ever was one instead of squandering his abilities on rapping in a fake language ... angstrom

    Klingon-Language Rapper » E-Mail

  • A new imaging technique developed by researchers at the University of Illinois overcomes the limit of diffraction and can reveal the atomic structure of a single nanocrystal with a resolution of less than one angstrom (less than one hundred-millionth of a centimeter).


  • Whoever makes them to a precision of 0.01 angstrom?

    Are Changes Brewing and How Does the Mind Fit In?

  • It was a circular floor, almost a thousand feet in diameter, domed with a double layer of controlled quartz that could give graded illumination from full to total darkness including monochrome light to within one tenth of an angstrom.

    Wild Dreams of Reality, 5

  • Her photograph #51 was clear enough to allow her to precisely determine the 34 angstrom helical repeat and the 20 angstrom helical diameter.

    Rosalind Elsie Franklin.

  • Quite a large and nifty machine (the size of a mainframe of the time, which my G-4 beats ten ways to sideways right now even though it's obsolete), and these crystals (rated 1.0 and 0.02 angstrom) were grown specifically for the technology in extremely difficult electromagnetic circumstances, and were at the time more precious than diamonds.

    All those liars for Jesus


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  • measure of computer-related anxiety equivalent to 1000 nail-bytes

    November 7, 2007

  • Point sionnach, for the Updike reference! I enjoyed the Rabbit series, but I *love* The Centaur.

    October 6, 2007

  • So how many tera-angstroms in a Rabbit Angstrom?

    October 6, 2007

  • True. Tera-angstrom it is.

    October 6, 2007

  • A mega-angstrom is still really small, 10^-4. I think you should start with Tera-angstrom and work your way up from there.

    October 6, 2007

  • Mega-angstrom?

    October 5, 2007

  • Ha! Though that implies your emotional pain is very, very small, since an angstrom is also "A unit of measure for a wavelength of light equal to ten one billionths of a meter or one-tenth of a nanometer. 10^-10 meters", according to this.

    October 5, 2007

  • unit of emotional pain

    February 20, 2007