Standard Lemma guide

petasecond

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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /ˈpɛ.təˌsɛk.ənd/

1

noun

Meaning 1

An SI unit of time equal to 1015 seconds. Symbol: Ps. (= 31 709 800 years)

Definition source: English Wiktionary via Wiktextract

Topics: metrology

Examples

  • Holonyms: giga-annum, gigayear < exasecond < zettasecond < yottasecond < ronnasecond < quettasecond
  • Meronyms: quectosecond < rontosecond < yoctosecond < zeptosecond < attosecond < femtosecond < picosecond < nanosecond < microsecond < millisecond < centisecond < decisecond < second < decasecond < minute < hectosecond < kilosecond < hour < day < week < megasecond < fortnight < month < year < gigasecond < century < kiloannum, kiloyear, millennium < terasecond < mega-annum, megayear

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From peta- + second.

Across languages

Translations

1 source translations are retained for this English entry.

  • French: pétaseconde — 1015 seconds