thermionic vacuum tube(n = noun.artifact) electron tube, thermionic tube, thermionic valve, tube, vacuum tube - electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope;
is a kind of electronic device
is a part of circuit, electric circuit, electrical circuit
has parts: anode, cathode, electrode, control grid, grid, plate
has particulars: acorn tube, diode, rectifying tube, rectifying valve, electron multiplier, gas-discharge tube, klystron, magnetron, pentode, television-camera tube, television pickup tube, tetrode, triode, x-ray tube

acorn tube, auditory tube, blow tube, boob tube, boron counter tube, bronchial tube, calyx tube, capillary tube, cartilaginous tube, cathode-ray tube, color television tube, color tube, color tv tube, colour television tube, colour tube, colour tv tube, counter tube, crookes tube, digestive tube, electron tube, endotracheal tube, eustachian tube, fallopian tube, gas-discharge tube, geiger tube, geiger-muller tube, geissler tube, germ tube, glow tube, hittorf tube, inner tube, ionization tube, kundt's tube, lenard tube, nasotracheal tube, neon tube, neural tube, picture tube, pitot tube, pitot's tube, pitot-static tube, pl'81cker tube, pollen tube, proportional counter tube, rear of tube, rectifying tube, sieve tube, speaking tube, static tube, television pickup tube, television tube, television-camera tube, test tube, thermionic, thermionic current, thermionic emission, thermionic tube, thermionic valve, torpedo tube, tricolor television tube, tricolor tube, tricolour television tube, tricolour tube, tube, tube foot, tube railway, tube well, tube wrench, uterine tube, vacuum, vacuum aspiration, vacuum bag, vacuum bomb, vacuum bottle, vacuum chamber, vacuum cleaner, vacuum flask, vacuum gage, vacuum gauge, vacuum pump, vacuum tube, venturi tube, vortex tube, water tube, x-ray tube