Definition of conservation of energy in English:

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conservation of energy

noun

A principle stating that energy cannot be created or destroyed, but can be altered from one form to another.
Example sentences
  • The first law of thermodynamics is the law of conservation of energy; energy is neither created nor destroyed.
  • This sequence of events does not violate the law of conservation of energy because energy is returned quickly enough to create an overall equilibrium.
  • The discovery of the neutrino was predicted on the basis of the principle of conservation of energy.

For editors and proofreaders

Syllabification: con·ser·va·tion of en·er·gy

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