Septillionth
adj, noun ·Rare ·Advanced level
Definitions
- 1 The person or thing in the septillionth position.
- 2 One of a septillion equal parts of a whole.
"We humans are so stuck in the middle of the cosmic scales — in average height, one-hundredth of one-septillionth (10^-24) the size of the observable universe, and with typical life spans of a couple octillion attoseconds. And an attosecond is an eternity compared with the lifetime of the elusive Higgs boson, a subatomic particle that exists for one-thousandth of an attosecond before decaying."
- 1 The ordinal form of the number septillion. not-comparable
Example
More examples"We humans are so stuck in the middle of the cosmic scales — in average height, one-hundredth of one-septillionth (10^-24) the size of the observable universe, and with typical life spans of a couple octillion attoseconds. And an attosecond is an eternity compared with the lifetime of the elusive Higgs boson, a subatomic particle that exists for one-thousandth of an attosecond before decaying."
Etymology
From septillion + -th (ordinal suffix).
More for "septillionth"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.