the state of being annihilated; extinction; destruction.
3.
Physics.
a.
Also called pair annihilation.the process in which a particle and antiparticle unite, annihilate each other, and produce one or more photons. Compare positronium.
b.
the conversion of rest mass into energy in the form of electromagnetic radiation.
Origin: 1630–40; (< F) < Late Latin annihilātiōn- (stem of annihilātiō). See annihilate, -ion
energy transmitted in wave motion, especially electromagnetic wave motion
the electric or magnetic force that acts between oppositely charged bodies, tending to draw them together
the attractive effect of matter on other matter; the region surrounding an astronomical body in which the force of gravitation is strong
a wave in which the direction of displacement is perpendicular to the direction of propagation, as a surface wave of water
a quantized state in which matter may exist, having constant energy and separated from others in the series by finite quantities of energy
the acceleration of a falling body in the earth's gravitational field, inversely proportional to the square of the distance from the body to the center of the earth
physics the destruction of a particle and its antiparticle when they collide. The annihilation of an electron with a positron generates two or, very rarely, three photons of annihilation radiation. The annihilation of a nucleon with its antiparticle generates several pions