word-forming element in compounds coined in physics, "having to do with electrons or subatomic particles," 1939, abstracted unetymologically from electron (Greek -tron was an instrumentive suffix).
Entries linking to -tron
electron n.
coined 1891 by Irish physicist George J. Stoney (1826-1911) from electric + -on, as in ion (q.v.). Electron microscope (1932) translates German Elektronenmikroskop.