Word.ws English Dictionary

supergrade

supergrade adjective: of plutonium: containing a very small portion of isotopes other than plutonium-239 (especially plutonium-240) (less than perhaps 3%), making the plutonium especially suitable for nuclear weapons.

Adjective

supergrade (not comparable)

  1. Of plutonium: containing a very small portion of isotopes other than plutonium-239 (especially plutonium-240) (less than perhaps 3%), making the plutonium especially suitable for nuclear weapons

Origin of supergrade

From super- + grade.

Questions about supergrade

What does supergrade mean?
Supergrade means of plutonium: containing a very small portion of isotopes other than plutonium-239 (especially plutonium-240) (less than perhaps 3%), making the plutonium especially suitable for nuclear weapons.
What part of speech is supergrade?
Supergrade is an adjective.

Words near supergrade in the dictionary

  1. supergood
  2. supergoodness
  3. supergovernment
  4. supergovernmental
  5. supergovernments
  6. supergrade
  7. supergradient
  8. supergraduate
  9. supergraduates
  10. supergrain
  11. supergrains

Source and license

Adapted from Wiktionary: supergrade (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Flame, not lame-supergrade.wav.

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