Meaning of -ON in English

-ON

-on 1

a suffix used in the names of subatomic particles ( gluon; meson; neutron ), quanta ( graviton ), and other minimal entities or components ( cistron; codon; magneton; photon ).

[ prob. extracted from ION; cf. PROTON ]

-on 2

a suffix used in the naming of inert gaseous elements: neon.

[ -on, neut. of -os adj. ending ]

Random House Webster's Unabridged English dictionary.      Полный английский словарь Вебстер - Random House .