Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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atomic energy the energy that is released by an atom in nuclear reactions such as fission or fusion. [2 definitions]
conservation of energy a principle of physics that asserts that the total energy in a closed system remains constant regardless of changes in the system.
high-energy emitting a great amount of energy, as certain chemical reactions. [3 definitions]
high-energy particle an atom or part of an atom having energy greater than one hundred thousand electron volts.
kinetic energy energy resulting from motion.
nuclear energy energy released from atomic nuclei, as in nuclear fission or fusion.
potential energy in physics, the energy of a particle, body, or system that is determined by its position or structure. (Cf. kinetic energy.)
radiant energy energy transmitted by waves, such as electromagnetic radiation or heat.