petawatt-hour

noun

A unit of energy equal to that provided by one petawatt of power acting for one hour (3·6 × 10¹⁸ joules).

“Holonym: terawatt-year (31.536e18 J)”

Meanings

nounpetawatt-hour (plural petawatt-hours)

plural petawatt-hours

  1. A unit of energy equal to that provided by one petawatt of power acting for one hour (3·6 × 10¹⁸ joules).

    Holonym: terawatt-year (31.536e18 J)

    1 more example

    Meronyms: kilojoule (1.000e3 J) < watt-hour (3.600e3 J) < milliwatt-year (31.536e3 J) < megajoule (1.000e6 J) < kilowatt-hour (3.600e6 J) < watt-year (31.536e6 J) < gigajoule (1.000e9 J) < megawatt-hour (3.600e9 J) < kilowatt-year (31.536e9 J) < terajoule (1.000e12 J) < gigawatt-hour (3.600e12 J) < megawatt-year (31.536e12 J) < petajoule (1.000e15 J) < terawatt-hour (3.600e15 J) < gigawatt-year (31.536e15 J) < exajoule (1.000e18 J)

Origin

By surface analysis, petawatt + hour, or, by surface analysis, peta- + watt-hour.

Full word history & related roots →
Cite this entry
APA

petawatt-hour. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/petawatt-hour

MLA

“petawatt-hour.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/petawatt-hour. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “petawatt-hour,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/petawatt-hour.

Source: petawatt-hour on Wiktionary, CC BY-SA 4.0.