English Explanatory Dictionary

supergrade

English dictionary entry

Meanings

adj
  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

Pronunciation

LL-Q1860 (eng)-Flame, not lame-supergrade.wav

Word forms

supergrade

Etymology

From super- + grade.

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