Standard Lemma guide

picometre

noun · 2 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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No pronunciation record was provided for this word.

1

noun

Meaning 1

An SI unit of length equal to 10−12 metres. Symbol: pm

Definition source: English Wiktionary via Wiktextract

Topics: metrology

Examples

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

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a metric unit of length equal to one trillionth of a meter

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: picometer, micromicron

Antonyms: none provided

Broader terms: metric linear unit

History

Etymology

No etymology was provided for this word.