Etymology From radio- (“pertaining to rays or radiation”) + -onics.
1
Any of several techniques supposed to detect and modulate "life forces" and to provide healing using various electric black boxes.
Tiller observes that pendulums, dowsing rods and radionics devices all serve to reduce the signal/noise ratio. They help the average individual who is not blessed with the gifts of concentration that are apparently inherent in gifted healers […]2004, Daniel J. Benor, Consciousness, Bioenergy and Healing, page 465:
radionics
noun
Etymology From radio- (“pertaining to radio waves”) + -onics.
1
Historical, Rare electronics, especially in radio technology.
But it's also because the Cambridge is British made by Sinclair Radionics Ltd, Europe's largest calculator manufacturer, with all the cost advantages of scale that this entails.1973 August 2, New Scientist, volume 59, number 857, page 273: