Daily Almanac for
May 24, 2012
Search: Infoplease Info search tips
Search: Biographies Bio search tips
| Share
 

Dictionary


an•ni•hi•la•tion



Pronunciation: (u-nī"u-lā'shun), [key]
—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.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

annihilateannihilation radiation
    • Cite
    • Print
    • Bookmark
See also:

 

Related Content
A free, reliable Q&A site for homework help. Answerplease.com