antiparticle

== English == === Alternative forms === anti-particle === Etymology === From anti- +‎ particle. === Pronunciation === IPA(key): /ˈæntiˌpɑ(ɹ)tɪkəl/ === Noun === antiparticle (plural antiparticles) (particle 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. ==== 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. ==== Derived terms ==== ==== Translations ==== ==== See also ==== antimatter self-conjugate