Skip to main content  50 USC § 47f - Definitions   As used in
this chapter— (a) The term “atomic energy” means all forms of
energy released in the course of nuclear fission or nuclear
transformation. (b) The term “atomic weapon” means any device
utilizing atomic energy, exclusive of the means for transporting
or propelling the device (where such means is a separable and
divisible part of the device), the principal purpose of which is
for use as, or for development of, a weapon, a weapon prototype,
or a weapon test device. (c) The term “special nuclear material”
means plutonium, or uranium enriched in the isotope 233 or in
the isotope 235, or any other material which is found to be
special nuclear material pursuant to the provisions of the
Atomic Energy Act of 1954 [42 U.S.C. 2011 et seq.]. (d) The term
“United States,” when used in a geographical sense, includes
Puerto Rico, all Territories and possessions of the United
States and the Canal Zone; except that in section 47c of this
title, the term “United Stat