Meanings
plural octillions
- AustraliaUKUSmodernshort scaleA thousand trillion trillion, a billion billion billion: 1 followed by 27 zeros, 10²⁷.
Altogether it takes seven billion billion billion (that’s 7,000,000,000,000,000,000,000,000,000, or seven octillion) atoms to make you.
2019, Bill Bryson, The Body: A Guide for Occupants, Black Swan (2020), pages 5–61 more example
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.
2023 October 9, Dennis Overbye, “The Science Nobel Winners Were Short and Fast”, in The New York Times, archived from the original on 12 Oct 2023 - AustraliaUKdatedlong scaleA trillion quintillion: 1 followed by 48 zeros, 10⁴⁸.
Synonyms & antonyms
a long scale quadrilliard
a short scale quindecillion
Origin
- Frenchoctillion
- Englishoctillion
From French octillion. By surface analysis, oct- (“eight”) + -illion.
More words from French
Full word history & related roots →Translations
Chinese Mandarin 一極 /一极
- 一極 /一极a trillion quintillion, 1048 — see also quindecillion
Esperanto kvariliardo, okiliono
- kvariliardoa thousand trillion trillion, 10
- okilionoa trillion quintillion, 1048 — see also quindecillion
Finnish kvadriljardi, oktiljoona
- kvadriljardia thousand trillion trillion, 10
- oktiljoonaa trillion quintillion, 1048 — see also quindecillion
French quadrilliard, octillion
- quadrilliarda thousand trillion trillion, 10
- octilliona trillion quintillion, 1048 — see also quindecillion
German Quadrilliarde, Oktillion
- Quadrilliardea thousand trillion trillion, 10
- Oktilliona trillion quintillion, 1048 — see also quindecillion
Hungarian kvadrilliárd
- kvadrilliárda thousand trillion trillion, 10
Icelandic kvaðrilljarður
- kvaðrilljarðura thousand trillion trillion, 10
Italian quatriliardo
- quatriliardoa thousand trillion trillion, 10
Japanese 千秭
- 千秭a thousand trillion trillion, 10
Malay oktilion
- oktiliona thousand trillion trillion, 10
Polish kwadryliard
- kwadryliarda thousand trillion trillion, 10
Portuguese octilhão
- octilhãoa thousand trillion trillion, 10
Russian октиллион, квиндециллион
- октиллион (oktillion)a thousand trillion trillion, 10
- квиндециллион (kvindecillion)a trillion quintillion, 1048 — see also quindecillion
Spanish mil cuatrillones, octillón
- mil cuatrillonesa thousand trillion trillion, 10
- octillóna thousand trillion trillion, 10
- octillóna trillion quintillion, 1048 — see also quindecillion
Turkish oktilyon
- oktilyona thousand trillion trillion, 10
Ukrainian октильйон
- октильйон (oktylʹjon)a thousand trillion trillion, 10
Welsh octiliwn
- octiliwna thousand trillion trillion, 10
Rhymes & wordplay
Rhymes with octillion
Anagrams
Cite this entry
octillion. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/octillion
“octillion.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/octillion. Accessed November 4, 2026.
WatkinsX Dictionary, s.v. “octillion,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/octillion.
Source: octillion on Wiktionary, CC BY-SA 4.0.