- suffix Physics, Biochemistry, & Chemistry forming nouns:1》 denoting subatomic particles or quanta: neutron.2》 denoting molecular units: codon.3》 denoting substances: interferon.Originsense 1 orig. in electron, from ion, influenced (as in sense 2) by Gk on 'being'; sense 3 is on the pattern of words such as cotton or from Ger. -on.
English new terms dictionary. 2014.