Word.ws English Dictionary

zepto-

Syllables: zep·to-/ˈzɛp.təʊ̯-/US/ˈzɛp.toʊ̯-/

zepto- prefix: in the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10⁻²¹ (short scale sextillionth or long scale trilliardth).

Prefix

zepto-

  1. In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10⁻²¹ (short scale sextillionth or long scale trilliardth).
    Antonyms:
    zetta-

zepto- meaning in Tamil, Persian and Vietnamese

zepto- in Tamil

செட்டோ

zepto- in Persian

10−21
زپتو

zepto- in Vietnamese

10−21
zép-tô, zep-tô, giép-tô

Antonyms of zepto-

Origin of zepto-

From Ancient Greek ἑπτᾰ́ (heptắ, “seven”), for the seventh order of 10⁻³. The final o conforms to the finals vowel of the SI series from micro- downwards; the letter z was added, as a start in a series of terms running backwards through the alphabet.

Words formed from zepto-

Questions about zepto-

What does zepto- mean?
Zepto- means in the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10⁻²¹ (short scale sextillionth or long scale trilliardth).
What is zepto- in Tamil?
Zepto- in Tamil is செட்டோ. See Zepto- meaning in Tamil.
What part of speech is zepto-?
Zepto- is a prefix.
How do you pronounce zepto-?
Zepto- is pronounced /ˈzɛp.təʊ̯-/ (UK).

Words near zepto- in the dictionary

  1. zeppoles
  2. zeppoli
  3. zeppolis
  4. Zepps
  5. zeps
  6. zepto-
  7. zepto-ampere
  8. zepto-amperes
  9. zepto-joule
  10. zeptoamperes
  11. zeptobarn

Source and license

Adapted from Wiktionary: zepto- (page history and authors); zepto- (Tamil Wiktionary) (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Vealhurl-zepto-.wav.

Cite this entry: “zepto-.” Word.ws, https://word.ws/zepto-. Based on Wiktionary, CC BY-SA 4.0.