activation energy

Noun

 * 1)  The energy required to initiate a reaction. For example, the flame from the fuse of a firecracker provides a small initial amount of energy, after which the explosive reaction proceeds by itself, releasing a considerably larger quantity of energy. A small push given to a stable but top-heavy object may cause it to fall over; the potential energy released during the fall was present in the system all along but could not be realized as long as the object was upright and balanced.

Translations

 * Afrikaans: aktiveringsenergie
 * Finnish:, aktivaatioenergia
 * Indonesian: energi aktivasi
 * Malay: tenaga pengaktifan
 * Persian: انرژی اکتیواسیون
 * Romanian: energie activantă, energie de activare
 * Serbo-Croatian: aktivacijska energija
 * Swedish:
 * Tagalog: sabilusing kusog
 * Turkish: aktivasyon enerjisi