vacuum tube

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vacuum tube

n.
An electron tube from which all or most of the gas has been removed, permitting electrons to move with low interaction with any remaining gas molecules.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

vacuum tube

or

vacuum valve

n
(Electronics) another name for valve3
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

vac′uum tube`


n.
an electron tube from which almost all air or gas has been evacuated.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

vacuum tube

An electron tube from which all air has been removed so that the moving electrons don't collide with any gas particles and can move more efficiently from one electrode to the other. Cathode-ray tubes, which include television picture tubes and other video display tubes, are the most widely used vacuum tubes. Compare electron tube.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.vacuum tube - electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelopevacuum tube - electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
acorn tube - a small vacuum tube; used at high frequencies
anode - a positively charged electrode by which electrons leave an electrical device
cathode - a negatively charged electrode that is the source of electrons entering an electrical device
circuit, electric circuit, electrical circuit - an electrical device that provides a path for electrical current to flow
diode, rectifying tube, rectifying valve - a thermionic tube having two electrodes; used as a rectifier
electrode - a conductor used to make electrical contact with some part of a circuit
electronic device - a device that accomplishes its purpose electronically
electron multiplier - a vacuum tube that amplifies a flow of electrons
gas-discharge tube - a tube in which an electric discharge takes place through a gas
control grid, grid - an electrode placed between the cathode and anode of a vacuum tube to control the flow of electrons through the tube
klystron - an electron tube used to generate or amplify electromagnetic radiation in the microwave region by velocity modulation
magnetron - a diode vacuum tube in which the flow of electrons from a central cathode to a cylindrical anode is controlled by crossed magnetic and electric fields; used mainly in microwave oscillators
pentode - a thermionic tube having five electrodes
plate - the positively charged electrode in a vacuum tube
television pickup tube, television-camera tube - a tube that rapidly scans an optical image and converts it into electronic signals
tetrode - a thermionic tube having four electrodes
triode - a thermionic vacuum tube having three electrodes; fluctuations of the charge on the grid control the flow from cathode to anode which makes amplification possible
X-ray tube - a vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
elektronka
elektroniputkityhjiöputki
elektronkaelektronska cijevvakuumska cijev
elektronenbuis
lampa próżniowa
References in periodicals archive ?
The blood culture bottles were disinfected with 70% alcohol and 3 mL of blood was collected with a 5 mL syringe and 70 x 25-mm needle into two microtubes (1.5 mL per microtube).
It is imagined that, in the utilization of microtube emitters, there is a range of inlet pressures in the line, around an optimal value that allows operation with proper distribution uniformity and, therefore, it is admissible that there are variations in the inlet pressure of lateral lines.
The device consists of a 300-[micro]m (inner diameter) microtube coated with selectins.
(Nasdaq:PBIO), South Easton, Mass, will unveil and release for sale its PCT MicroTube Adapter Kit (patent pending) at the 57th Annual Conference of the American Society for Mass Spectrometry (ASMS), to be held at the Pennsylvania Convention Center (Philadelphia, PA) from May 31 - June 4, 2009.
The "Groovin Tubes" Programmable Benchtop Microtube Shaker/Incubator is designed for applications requiring heating and/or shaking of samples contained in microoentrifuge tubes.
showed the fabricated PANI microtube with nanostructured walls using naphthalene-sulfonic acid (NSA) [27, 28].
Before DNA extraction, the flies were placed in a sterile 1.5-mL microtube, washed with 70% ethanol, and rinsed with sterile water.
His lab is a hotbed of microtube technologies because microtubes have more space-related applications than the Mojave has desert.
At SKMC, pediatric specimens are currently collected into a capillary blood collection microtube, obtained mainly from infants and newborns.
Labnet International's Ac-cuTherm Microtube Shaking Incubator is a temperature-controlled lab vortexer that uses Peltier technology to rapidly heat and cool precious samples.
The authors' approach is to coat a microtube with a mixture of E-selectin and an antibody.
In the recent years, (Lelea et al., 2004), have made the experimental research on microtube heat transfer and fluid flow with inner diameters between 100 and 500 pm for laminar regime of the water flow.