-on

I. noun suffix Etymology: International Scientific Vocabulary, alteration of -one chemical compound not a ketone or other oxo compound <

parathion

> II. noun suffix Etymology: from -on (in ion) 1. subatomic particle <

nucleon

> 2. a. unit ; quantum <

photon

> <

magneton

> b. basic hereditary component <

cistron

> <

operon

> III. noun suffix Etymology: New Latin, from -on (in argon) noble gas <

radon

>