trillionths
One over one trillion
Trillionths is the plural of trillionth—the ordinal and fractional form of trillion.
As an ordinal, it names position in a sequence of a trillion items.
As a fraction, it names parts when something is divided into a trillion equal pieces: measured in trillionths of a second.
The word appears most often in scientific contexts dealing with extremely small quantities.
Billionth-meter dimension
- picometersTrillionths of a meter
- femtometersTrillionths of millimeters
- angstromsTen-billionths of meters
- subatomicSmaller than atoms
quantum · Planck · microscopic · molecular · atomic · electrons · photons · quarks
Fraction's bottom number
- numeratorNumber being divided
- decimalTenths-based notation
- fractionalDescribing incomplete portions
- divisorNumber you split by
dividend · quotient · ratio · proportion · millionths · percentage · portion · segment
Metric unit, billion-fold smaller
- picometerTrillionth of a meter
- femtometer10⁻¹⁵ meters
- micrometerMillionth of a meter
- calibrationAdjusting for measurement accuracy
metrology · spectrometer · interferometer · tolerance · resolution · precision · accuracy · instrumentation
Unit smaller than minute
- nanosecondOne-billionth second unit
- picosecondTrillionth of a second
- femtosecondQuadrillionth of a second
- attosecondQuintillionth of a second
duration · instant · interval · chronometry · oscillation · frequency
nanoscale
Billionth-meter dimension
- picometersTrillionths of a meter
- femtometersTrillionths of millimeters
- angstromsTen-billionths of meters
subatomic · quantum · Planck · microscopic · molecular · atomic · electrons · photons · quarks · neutrinos
denominator
Fraction's bottom number
- numeratorNumber being divided
- decimalTenths-based notation
- fractionalDescribing incomplete portions
divisor · dividend · quotient · ratio · proportion · millionths · percentage · portion · segment · slice
nanometer
Metric unit, billion-fold smaller
- picometerTrillionth of a meter
- femtometer10⁻¹⁵ meters
- micrometerMillionth of a meter
calibration · metrology · spectrometer · interferometer · tolerance · resolution · precision · accuracy · instrumentation · detection
second
Unit smaller than minute
- nanosecondOne-billionth second unit
- picosecondTrillionth of a second
- femtosecondQuadrillionth of a second
attosecond · duration · instant · interval · chronometry · oscillation · frequency
trillionthstrillions
Thousands of billions
wholes · billions · millions · quadrillions · quintillions