Wiktionary
angstrom unit
n. (context physics English) (alternative form of angstrom English)
WordNet
angstrom unit
n. a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation [syn: angstrom, A]
Usage examples of "angstrom unit".
An Angstrom unit (abbreviated A) is a very small unit of length, equal to 1/100,000,000 of a centimeter, or 1/250,000,000 of an inch.