Radar

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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]

From WordNet (r) 2.0 [wn]:

  radar
       n : measuring instrument in which the echo of a pulse of
           microwave radiation is used to detect and locate distant
           objects [syn: {microwave radar}, {radio detection and
           ranging}, {radiolocation}]

From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:

  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