tetrode

noun

tet·​rode ˈte-ˌtrōd 

: a vacuum tube with a cathode, an anode, a control grid, and an additional grid or other electrode

Examples of tetrode in a Sentence

Recent Examples on the Web

Synaptic purge To find out how many synapses are lost during QIH, Tanaka’s team implanted tetrodes, bundles of fine electrodes, into the hippocampus of freely moving mice. — Jacek Krywko, ArsTechnica, 22 Aug. 2026

Depending on how many grids the tube has, it is called a diode (no grids), a triode (one grid), a tetrode (two grids), and so on. — IEEE Spectrum, 29 Oct. 2020

Word History

First Known Use

1886, in the meaning defined above