Attometre

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    An SI unit of length equal to 10⁻¹⁸ metres. Symbol: am

    "Holonyms: femtometre < picometre < nanometre < micrometre < millimetre < centimetre < decimetre < metre < kilometre < megametre < gigametre < terametre < petametre < exametre < zettametre < yottametre < ronnametre < quettametre"

Synonyms

All synonyms
am

Example

More examples

"Holonyms: femtometre < picometre < nanometre < micrometre < millimetre < centimetre < decimetre < metre < kilometre < megametre < gigametre < terametre < petametre < exametre < zettametre < yottametre < ronnametre < quettametre"

Etymology

From atto- + metre.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.