### Question
How is the term highly enriched uranium defined?


### Answer
The term **highly enriched uranium** is defined in *50 U.S.C. § 2302* as the following:

> uranium enriched to 20 percent or more in the isotope U–235

#### Citation:
  - *50 U.S.C. § 2302*
  - Heading: **CHAPTER 40-DEFENSE AGAINST WEAPONS OF MASS DESTRUCTION**

