Dictionary

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

activation energy

noun ac·ti·va·tion energy \ˌak-tə-ˈvā-shən-\   (Medical Dictionary)

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

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