femtovolt
/ˈfɛmtoʊˌvoʊlt/
noun
- A unit of electric potential equal to one quadrillionth of a volt (10⁻¹⁵ volts), used in extremely sensitive electrical measurements.
- A femtovolt is a billion times smaller than a millivolt.
- Researchers measured the voltage across a single atom in femtovolts.
- The sensor can detect changes as small as a few femtovolts.