Association of British Scrabble Players   antiatom an atom
composed of ANTIPARTICLES. antibaryon the antiparticle of the
BARYON. antielectron the antiparticle of the ELECTRON.
antilepton the antiparticle of the LEPTON. antimatter matter
composed of antiparticles. antimuon the antiparticle of a MUON.
antineutrino the antiparticle of the NEUTRINO. antineutron the
antiparticle of the NEUTRON. antiparticle the 'pair' of an
elementary particle, particle and antiparticle being mutually
destructive, having the same mass and spin but having opposite
values for their other properties (eg charge, baryon number,
strangeness). antiproton the antiparticle of the PROTON.
antiquark the antiparticle of the QUARK. atom the smallest
particle in an element which can take part in a chemical
reaction. axion a hypothetical subatomic particle. baryon a
heavy subatomic particle involved in strong interactions with
other subatomic particles and composed of three quarks bound
together by GLUON. baryonic relating to BARYONS, heavy suba