The phenomenon in which a particle and an antiparticle, such as an electron and a positron, meet and are converted completely to energy approximately equivalent to the sum of their masses.

• 湮灭，湮没一种物理现象，一个粒子和它的反粒子，如一个负电子与一个正电子相遇时，转化为与粒子总能量大约相等的能量