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Radar    音标拼音: [r'ed,ɑr]
n. 雷达,电波探测器

雷达,电波探测器

radar
雷达

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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