megasecond

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noun

An SI unit of time equal to 10⁶ seconds. Symbol: Ms. (= 11.5741 days)

Scrabble 16

Meanings

nounmegasecond (plural megaseconds)

plural megaseconds

  1. metrologyAn SI unit of time equal to 10⁶ seconds. Symbol: Ms. (= 11.5741 days)

    Holonyms: fortnight < month < year < gigasecond < 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

Origin

  1. Proto-Indo-European*méǵh₂s
  2. Proto-Hellenic*mégas
  3. Ancient Greekμέγᾰς (mégăs)
  4. Englishmega-
  5. Englishsecond
  6. Englishmegasecond

From mega- + second.

Full word history & related roots →

Translations

Dutch megaseconde
  • megaseconde1,000,000 seconds
Slovak megasekunda
  • megasekunda1,000,000 seconds
Spanish megasegundo
  • megasegundo1,000,000 seconds
Cite this entry
APA

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

MLA

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

Chicago

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

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