Standard Lemma guide

terasecond

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 time equal to 1012 seconds. Symbol: Ts. (= 31709.8 years)

Definition source: English Wiktionary via Wiktextract

Topics: metrology

Examples

  • Holonyms: mega-annum, megayear < petasecond < 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

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From tera- + second.

Across languages

Translations

1 source translations are retained for this English entry.

  • Polish: terasekunda — 1,000,000,000,000 seconds