permatron/ˈpɜː.məˌtɹɒn/EtymologyFrom a trade name. Blend of perma(nent) + -tron.permatron means A hot-cathode rectifier with anode current controlled by magnetic field. Lexicurio rates it Sui generis — a strength score of 91 out of 100.nounA hot-cathode rectifier with anode current controlled by magnetic field.