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Radar 音標拼音: [r'ed,ɑr] n. 雷達,電波探測器 雷達,電波探測器 radar 雷達 radar n 1: measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects [synonym: {radar}, {microwave radar}, {radio detection and ranging}, {radiolocation}] radar \ra"dar\ (r[=a]"d[aum]r), n. [acronym from RAdio Detection And Ranging.] 1. An electronic device designed to detect objects at a distance, and determine their distance from the device, by transmitting a pulse of radio waves and measuring the time required for the echo of the pulse to return to the emitting device; as, the radar showed a plane approaching rapidly. For more information of radar, see the article What is Radar?. [acronym] [PJC] 2. The method of detecting objects, finding their distance, or determining their speed, by use of a radar[1] device; as, modern radar can detect objects as small as raindrops. [PJC] 92 Moby Thesaurus words for "radar": AA radar, AFC, AFC mixer, CRT, CW oscillator, MAD radar, Navaglobe, Oboe, TR switch, TR unit, VAR, Volscan, altimeter, amplifier, analyzer, astronavigation, automatic electronic navigation, automation, avionics, cascade screen, cathode-ray tube, celestial navigation, chronometer, coastwise navigation, consolan, dead reckoning, demodulator, detector, discriminator, early-warning radar, electron microscopy, electron optics, electron physics, electronic engineering, electronic navigation, electronics, electrophysics, fix, frequency meter, gun-directing radar, hard-tube pulser, indicator, interception radar, limiter, line of position, local oscillator, long-range radar, loran, magnetron, microwave mixer, mixer, modulator, navar, navigation, network pulser, omnidirectional range, omnirange, oscillator, overlapping, panoramic radar, photoelectricity, pilotage, plane sailing, point-to-point navigation, potentiometer, pulse generator, radar telescope, radio, radio beacon, radio navigation, radionics, range-sweep amplifier, range-sweep generator, receiver, screen, second detector, sextant, shoran, sofar, sonar, square-wave generator, synchronizer, tables, tacan, teleran, television, timing unit, tracker, transistor physics, transmitter, trigatron, visual-aural range |
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