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angstrom

ang·strom [ ángstrəm ] (plural ang·stroms)


noun 
Definition:
 
1. unit used to measure electromagnetic radiation: a unit of length equal to one ten-billionth of a meter (10-10 m), used to measure the wavelengths of electromagnetic radiations.
Symbol  Å


2. "a" with (°) above it: the letter "a" with a mark (°) placed above it, used in some Scandinavian languages to indicate a change in pronunciation from "a" to "aw"

[Late 19th century. After Anders Jonas Ångström (1814-1874), Swedish physicist]
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