Definition of quadrillionth in English:


Pronunciation /-ˈdrilyənT͟H/

ordinal number

See quadrillion

‘With the neutrons traveling much, much faster, I estimate about 28 percent of the material will go critical in that quadrillionth of a second.’
  • ‘In addition, LCLS X-ray pulses will be extremely short - lasting only femtoseconds, mere quadrillionths of a second.’
  • ‘A femtosecond is a millionth of a billionth (or one quadrillionth) of a second.’