FromDanishatten(“eighteen”), extending the idea to howfemto- is derived fromDanishfemten(“fifteen”) and thefermi unit.

atto-

1. In theInternational System of Units and othermetric systems of units, multiplying theunit to which it is attached by 10⁻¹⁸ (short scalequintillionth orlong scaletrillionth). Symbol: a

• exa-

• to a T,toat,tota

Borrowed fromDanishatten(“eighteen”).

atto-

1. atto-

• “atto-” inDiccionari de la llengua catalana, segona edició,Institut d’Estudis Catalans.
• “atto-”, inGran Diccionari de la Llengua Catalana,Grup Enciclopèdia Catalana,2025
• “atto-” inDiccionari normatiu valencià,Acadèmia Valenciana de la Llengua.

Fromatten(“eighteen”).

atto-

1. atto-

DutchWikipedia has an article on:

Atto

Wikipedia^nl

FromDanishatten(“eighteen”).

• IPA^(key): /ˈɑ.toː/

• Audio:

  (file)

atto-

1. atto-

Internationalism (seeEnglishatto-).

• IPA^(key): /ˈɑtːo-/,[ˈɑ̝t̪ːo̞-]

atto-

1. atto-

• “atto-”, inKielitoimiston sanakirja [Dictionary of Contemporary Finnish]‎^[1] (in Finnish) (online dictionary, continuously updated), Kotimaisten kielten keskuksen verkkojulkaisuja 35, Helsinki:Kotimaisten kielten tutkimuskeskus (Institute for the Languages of Finland),2004–, retrieved2023-07-02

• otat,taot,tota

• Audio:

  (file)

atto-

1. atto-

Derived fromDanishatten.

• IPA^(key): /at.tɔ/

• Audio:

  (file)

• Rhymes:-attɔ
• Syllabification:[please specify syllabification manually]

atto-

1. atto-

   ‎atto- + ‎sekunda → ‎attosekunda

• atto- in Polish dictionaries at PWN

Borrowed fromDanishatten(“eighteen”).

• IPA^(key): /ˈadto/[ˈað̞.t̪o]
• Rhymes:-adto

atto-

1. atto-

• “atto-”, inDiccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8,Royal Spanish Academy [Spanish:Real Academia Española], 2024 December 10

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