noun🔗ShareA thermionic valve containing an anode, a cathode, and a control grid; small changes to the charge on the grid control the flow from cathode to anode, which makes amplification possible."The old radio used a triode to amplify the weak signal from the antenna, making the music audible. "electronicsdevicetechnologymachineelectricsignalphysicsChat with AIVocabulary GamePractice Reading
