Standard Lemma guide

zeptometre

noun · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

An SI unit of length equal to 10−21 metres. Symbol: zm

Definition source: English Wiktionary via Wiktextract

Topics: metrology

Examples

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

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From zepto- + metre.