English dictionary

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English *noun*: electron tube
1.	electron tube (artifact) electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
		Synonyms	thermionic tube, thermionic vacuum tube, thermionic valve, tube, vacuum tube
		Broader (hypernym)	electronic device
		Narrower (hyponym)	acorn tube, diode, electron multiplier, gas-discharge tube, klystron, magnetron, pentode, rectifying tube, rectifying valve, television pickup tube, television-camera tube, tetrode, triode, X-ray tube
		Part holonym	anode, cathode, control grid, electrode, grid, plate
		Part meronym	circuit, electric circuit, electrical circuit

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