"angstroms" in the noun sense
1. angstrom, angstrom unit, A
a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron used to specify wavelengths of electromagnetic radiation
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License