uranium 238

U u

Definition of uranium 238 words

noun uranium 238 the radioactive uranium isotope having a mass number 238, comprising 99.28 percent of natural uranium: used chiefly in nuclear reactors as a source of the fissionable isotope plutonium 239. 1

before 1940

One of the 7% newest English words

First recorded in 1940-45

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exclamation

This term is known only to a narrow circle of people with rare knowledge. Only 5% of English native speakers know the meaning of this word.

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