mega-joule

noun

One million ( 10⁶ ) joules. Symbol: MJ.

Meanings

nounmega-joule (plural mega-joules)

plural mega-joules · alternative megajoule

  1. One million ( 10⁶ ) joules. Symbol: MJ.

Origin

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

From mega- + joule.

Full word history & related roots →
Cite this entry
APA

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

MLA

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

Chicago

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

Source: mega-joule on Wiktionary, CC BY-SA 4.0.