Meaning of ANNIHILATION in English

ANNIHILATION

/euh nuy'euh lay"sheuhn/ , n.

1. the act or an instance of annihilating.

2. 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. Cf. positronium .

b. the conversion of rest mass into energy in the form of electromagnetic radiation.

[ 1630-40; ( annihilation- (s. of annihilatio ). See ANNIHILATE, -ION ]

Random House Webster's Unabridged English dictionary.      Полный английский словарь Вебстер - Random House .