pentode

[ pen-tohd ]
/ ˈpɛn toʊd /

noun Electronics.

a vacuum tube having five electrodes, usually a plate, three grids, and a cathode, within the same envelope.

Origin of pentode

1915–20; pent- + -ode2

Words nearby pentode

pentland firth, pentlandite, pentobarbital, pentobarbital sodium, pentobarbitone, pentode, pentolite, pentomic, pentosan, pentose, pentose nucleic acid

Example sentences from the Web for pentode

  • Remember how he went to all the trouble of building a pentode vacuum tube for a job that could have been done by transistors.

    Anything You Can Do |Gordon Randall Garrett

British Dictionary definitions for pentode

pentode
/ (ˈpɛntəʊd) /

noun

an electronic valve having five electrodes: a cathode, anode, and three grids
(modifier) (of a transistor) having three terminals at the base or gate

Word Origin for pentode

C20: from penta- + Greek hodos way

Scientific definitions for pentode

pentode
[ pĕn′tōd′ ]

Any electron tube with the basic structure and functionality of a triode, but including two extra electrodes, a screen and a suppressor grid. The screen helps the tube respond well at high frequencies (as in a tetrode), while a negatively charged suppressor grid adjacent to the plate prevents secondary emission of electrons from the plate, increasing the efficiency of the tube. See more at suppressor.