quintillionth
One in quintillion
Quintillionth describes the position in a sequence numbered one quintillion (1 followed by 18 zeros in American usage, 30 zeros in British), or one part when something is divided into that many equal portions.
The word appears almost exclusively in scientific contexts involving extremely small measurements or astronomical quantities: a quintillionth of a second, a quintillionth of a gram.
Smaller than atoms
- quantumSmallest discrete unit
- picometerTrillionth of a meter
- femtometer10⁻¹⁵ meters
- angstromSubatomic length unit
nanometer · particle · electron · quark · neutrino · photon · wavelength · attosecond
Quantity approaching zero
- decimalTenths-based notation
- microscopicToo small for eyes
- minusculeExtremely small in size
- nanoscaleBillionth-meter dimension
precision · measurement · subdivision · denominator · numerator · ratio · proportion · percentage
Beyond mental grasp
- improbableNot likely true
- negligibleToo small to consider
- vanishingCeasing to be visible
- imperceptibleCannot be sensed
undetectable · theoretical · abstract · hypothetical · unfathomable · incomprehensible · incalculable
Ordered succession of elements
- rankingOrdered position assignment
- positionLocation or stance
- placementPutting somewhere specific
- precedenceSuperior rank or importance
numeration · enumeration · index · hierarchy · progression · order · arrangement · series
subatomic
Smaller than atoms
- quantumSmallest discrete unit
- picometerTrillionth of a meter
- femtometer10⁻¹⁵ meters
angstrom · nanometer · particle · electron · quark · neutrino · photon · wavelength · attosecond
infinitesimal
Quantity approaching zero
- decimalTenths-based notation
- microscopicToo small for eyes
- minusculeExtremely small in size
nanoscale · precision · measurement · subdivision · denominator · numerator · ratio · proportion · percentage · increment
inconceivable
Beyond mental grasp
- improbableNot likely true
- negligibleToo small to consider
- vanishingCeasing to be visible
imperceptible · undetectable · theoretical · abstract · hypothetical · unfathomable · incomprehensible · incalculable
sequence
Ordered succession of elements
precedence · numeration · enumeration · index · hierarchy · progression · order · arrangement · series · tier
quintillionthcardinal
Of foremost importance
quintillion · one · integer · whole number · five