cathode-ray tube(n = noun.artifact) crt - a vacuum tube in which a hot cathode emits a beam of electrons that pass through a high voltage anode and are focused or deflected before hitting a phosphorescent screen;
is a kind of gas-discharge tube
is a part of computer, computing device, computing machine, data processor, electronic computer, information processing system, cathode-ray oscilloscope, cro, oscilloscope, scope, television, television system
has parts: electron gun, crt screen, screen
has particulars: crookes tube, kinescope, picture tube, television tube

acorn tube, auditory tube, blow tube, boob tube, boron counter tube, bronchial tube, calyx tube, capillary tube, cartilaginous tube, cathode-ray oscilloscope, 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 tube, thermionic vacuum tube, torpedo tube, tricolor television tube, tricolor tube, tricolour television tube, tricolour tube, tube, tube foot, tube railway, tube well, tube wrench, uterine tube, vacuum tube, venturi tube, vortex tube, water tube, x-ray tube