- -on
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-on1
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]-on2a suffix used in the naming of inert gaseous elements: neon.[ Gk -on, neut. of -os adj. ending]
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Universalium. 2010.