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(General Physics) physics 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
either of two types of charged intermediate vector boson, one positively charged and the other negatively charged.Symbols: W + , W−
[1970–75; appar. for weak]