a type of elementary particle with either a positive or negative charge considered to transmit the weak interaction between other elementary particles. W particles have a rest mass of 1.435 × 10–25 kg
Also called: W boson. See also Z particle
W particle in American English
Particle Physics
either of the two electrically charged weakons with a mass of 80.3 GeV/c2, which is c. 157,000 times the mass of an electron