An unstable elementary particles, belonging to the class called
→ baryons, which have greater mass than the neutron but very short lives
(10-8 to 10-10 seconds).
From → hyper- + → -on
a suffix used in the names of elementary particles (gluon; meson; neutron; graviton, and so on).
© 2005-2021 by M. Heydari-Malayeri