yocto-

yoc·to-
UK/ˈjɒk.təʊ̯-/US/ˈjɑk.toʊ̯-/

prefix

In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10⁻²⁴ short scale septillionth or long scale quadrillionth).

Opposite

Meanings

prefix
  1. In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10⁻²⁴ short scale septillionth or long scale quadrillionth).

    Antonyms: yotta-

Synonyms & antonyms

prefixIn the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10⁻²⁴ short scale septillionth or long scale quadrillionth).

Opposite

Origin

  1. Ancient Greekὀκτώ“eight”
  2. Englishyocto-

From Ancient Greek ὀκτώ (oktṓ, “eight”), for the eighth order of 10⁻³. The letter y was added, as the second term in a series running backwards through the alphabet.

Full word history & related roots →

Translations

Bulgarian йокто-
  • йокто- (jokto-)10−24
Chinese Mandarin 幺科托
  • 幺科托 (yāokētuō)10−24
Dutch yocto-
  • yocto-10−24
Finnish jokto-
  • jokto-10−24
French yocto-
  • yocto-10−24
German yokto-
  • yokto-10−24
Icelandic joktó-
  • joktó-10−24
Indonesian yokto-
  • yokto-10−24
Japanese ヨクト-
  • ヨクト- (yokuto-)10−24
Malay yokto-
  • yokto-10−24
Russian йокто-
  • йокто- (jokto-)10−24
Thai ยอกโต-
  • ยอกโต- (yɔ̂ɔk-too-)10−24
Ukrainian йокто-
  • йокто- (jokto-)10−24
Vietnamese yóc-tô, yoc-tô
  • yóc-tô10−24
  • yoc-tô10−24
Cite this entry
APA

yocto-. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/yocto-

MLA

“yocto-.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/yocto-. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “yocto-,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/yocto-.

Source: yocto- on Wiktionary, CC BY-SA 4.0.