noun
atomic energy
Refers to energy released from atomic nuclei, typically in the context of nuclear power or weapons.
原子エネルギーの平和利用が進められている。
The peaceful use of atomic energy is being promoted.
原子力 is the more common term for nuclear power, while 原子エネルギー is a direct loan translation of 'atomic energy' and is used in similar contexts but less frequently.
Compound of 原子 (atom) and エネルギー (energy), a direct translation of the English term 'atomic energy'.