different between antiparticle vs antimatter

English

Etymology

anti- +? particle

Alternative forms

• anti-particle

Pronunciation

• IPA^(key): /?ænti?p??t?k?l/

Noun

antiparticle (plural antiparticles)

1. (physics) A subatomic particle corresponding to another particle with the same mass, spin and mean lifetime but with charge, parity, strangeness and other quantum numbers flipped in sign; a particle that has a reversed world line to another.
   • 1988, Stephen Hawking, A Brief History of Time: From the Big Bang to Black Holes (page 75)

     There could be whole antiworlds and antipeople made out of antiparticles. However, if you meet your antiself, don't shake hands!

Translations

Usage notes

• The symbol for an antiparticle is the symbol for the normal particle plus "bar" (e.g. pbar) or with a bar above the symbol.

See also

• self-conjugate

English

Etymology

From anti- +? matter. Coined by British physicist Arthur Schuster in 1898 to describe matter that resists gravity in a jocular article in Nature titled "Potential Matter.—A Holiday Dream", but not used in a modern sense until the 1940s.

Alternative forms

• anti-matter

Pronunciation

• IPA^(key): /?ænti?mæt?/, /?ænta??mæt?/

Noun

antimatter (usually uncountable, plural antimatters)

1. (physics) Matter that is composed of the antiparticles of those that constitute normal matter.
2. (physics) A form of matter that has a key property, such as charge, opposite to that of ordinary matter.

Derived terms

• antimatter rocket

Translations