The story
From a trade name. Blend of perma(nent) + -tron.
Etymology from Wiktionary, CC BY-SA 4.0.
permatron
Today it means: A hot-cathode rectifier with anode current controlled by magnetic field. Full definition →
Today it means: A hot-cathode rectifier with anode current controlled by magnetic field. Full definition →
From a trade name. Blend of perma(nent) + -tron.
Etymology from Wiktionary, CC BY-SA 4.0.