| 释义 | Lenard tube
 |  | 1. | (Elec.) A tube for producing Lenard rays. | 
 Lenard tube
 Lenard tube[′lā‚närt ‚tüb]  (electronics) An early experimental electron-beam tube that had a thin glass or metallic foil window at the end opposite the cathode, through which the electron beam could pass into the atmosphere. |