activation energy

noun

Definition of activation energy 

: the minimum amount of energy required to convert a normal stable molecule into a reactive molecule

First Known Use of activation energy

1924, in the meaning defined above

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The first known use of activation energy was in 1924

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activation energy

noun
ac·ti·va·tion energy | \ˌak-tə-ˈvā-shən- \

Medical Definition of activation energy 

: the minimum amount of energy required to convert a normal stable molecule into a reactive molecule

called also energy of activation

More from Merriam-Webster on activation energy

Britannica.com: Encyclopedia article about activation energy

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