gigasecond

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noun

An SI unit of time equal to 10⁹ seconds. Symbol: Gs. (= 31.7098 years)

“Holonyms: century < kiloannum, kiloyear, millennium < terasecond < mega-annum, megayear < petasecond < giga-annum, gigayear < exasecond < zettasecond < yottasecond < ronnasecond < quettasecond”

Scrabble 15

Meanings

noungigasecond (plural gigaseconds)

plural gigaseconds

  1. metrologyAn SI unit of time equal to 10⁹ seconds. Symbol: Gs. (= 31.7098 years)

    Holonyms: century < kiloannum, kiloyear, millennium < terasecond < mega-annum, megayear < petasecond < giga-annum, gigayear < exasecond < zettasecond < yottasecond < ronnasecond < quettasecond

    1 more example

    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

Origin

  1. Ancient GreekΓίγας (Gígas)
  2. Ancient Greekγίγας (gígas)
  3. Englishgiga-
  4. Englishsecond
  5. Englishgigasecond

From giga- + second.

Full word history & related roots →

Translations

Slovak gigasekunda
  • gigasekundaa unit of time
Swedish gigasekund
  • gigasekunda unit of time
Cite this entry
APA

gigasecond. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/gigasecond

MLA

“gigasecond.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/gigasecond. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “gigasecond,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/gigasecond.

Source: gigasecond on Wiktionary, CC BY-SA 4.0.