Definitions

1. noun

A type of vacuum tube or valve that has five electrodes.

“The electronics expert carefully assembled the pentode to get the desired frequency.”

2. noun

A type of tube that is used in audio equipment, such as amplifiers and preamplifiers.

“The musician adjusted the settings on the amplifier with a pentode to enhance the sound.”

3. noun

A device that contains a pentode and is used to amplify or regulate electrical signals.

“The engineer designed a device that utilized a pentode to control the flow of electricity.”