atto-

See also: atto, attó, attò, and attõ

English

Etymology

From Danish atten (“eighteen”), extending the idea to how femto- is derived from Danish femten (“fifteen”) and the fermi unit.

Prefix

SI prefix

a	Previous:	zepto-
	Next:	femto-

atto-

1. In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10⁻¹⁸. Symbol: a

Antonyms

• exa-

Derived terms

English words prefixed with atto-

Translations

unit of measure

• Catalan: atto-
• Danish: atto-
• Dutch: atto- (nl)
• Finnish: atto- (fi)
• French: atto- (fr)
• Galician: atto- (gl)
• Icelandic: attó-

• Indonesian: ato-
• Irish: ata-
• Japanese: アト- (ato-)
• Malay: ato-
• Russian: атто- (ru) (atto-)
• Ukrainian: атто- (atto-)

Anagrams

• to a T, toat, tota

---

Catalan

Etymology

From Danish atten (“eighteen”).

Prefix

atto-

1. atto-

Further reading

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

---

Danish

Etymology

From atten (“eighteen”).

Prefix

atto-

1. atto-

---

Dutch

Etymology

From Danish atten (“eighteen”).

Pronunciation

• IPA^(key): /ˈɑ.toː/

• Audio

  (file)

Prefix

atto-

1. atto-

Dutch words prefixed with atto-

---

Finnish

Prefix

atto-

1. atto-

Anagrams

• otat, taot, tota

---

French

Pronunciation

• Audio

  (file)

Prefix

atto-

1. atto-

---

Spanish

Etymology

From Danish atten (“eighteen”).

Pronunciation

• IPA^(key): /ˈaddo/, [ˈað̞.ð̞o]

Prefix

atto-

1. atto-

Further reading

• “atto-” in Diccionario de la lengua española, Vigésima tercera edición, Real Academia Española, 2014.