Measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects.

synonyms: microwave radar, radio detection and ranging, radiolocation.

Roget 466: measurement, admeasurement^†, mensuration, survey, valuation, appraisement, assessment, assize; estimate, estimation; dead reckoning, reckoning etc. (numeration) 85; gauging etc. v.; horse power.    metrology, weights and measures, compound arithmetic.    measure, yard measure, standard, rule, foot rule, compass, calipers; gage, gauge; meter, line, rod, check; dividers; velo^†.    flood mark, high water mark; Plimsoll line; index etc. 550.    scale; graduation, graduated scale; nonius^†; vernier etc. (minuteness) 193.    [instruments for measuring] bathometer, galvanometer, heliometer, interferometer, odometer, ombrometer^†, pantometer^†, pluviometer^†, pneumatometer^†, pneumometer^†, radiometer, refractometer, respirometer, rheometer, spirometer^†, telemeter, udometer^†, vacuometer^†, variometer^†, viameter^†, thermometer, thermistor (heat) etc. 382, barometer (air) etc. 338, anemometer (wind) 349, dynamometer, goniometer, (angle) 244 meter; landmark etc. (limit) 233; balance, scale etc. (weight) 319; marigraph^†, pneumatograph^†, stethograph^†; rain gauge, rain gage; voltmeter (volts), ammeter (amps); spectrophotometer (light absorbance); mass spectrophotometer (molecular mass); geiger counter, scintillation counter (radioactivity); pycnometer (liquid density); graduated cylinder, volumetric flask (volume); radar gun (velocity); radar (distance); side-looking radar, (shape, topography); sonar (depth in water); light meter (light intensity); clock, watch, stopwatch, chronometer (time); anemometer (wind velocity); densitometer (color intensity). measurability, computability, determinability^†.    coordinates, ordinate and abscissa, polar coordinates, latitude and longitude, declination and right ascension, altitude and azimuth.    geometry, stereometry^†, hypsometry^†; metage^†; surveying, land surveying; geodesy, geodetics^†, geodesia^†; orthometry^†, altimetry^†; cadastre [Fr.].    astrolabe, armillary sphere^†.    land surveyor; geometer.    ... show more

Roget 668: warning, early warning, caution, caveat; notice etc. (information) 527; premonition, premonishment^†; prediction etc. 511; contraindication, lesson, dehortation^†; admonition, monition; alarm etc. 669.    handwriting on the wall, mene mene tekel upharsin, red flag, yellow flag; fog-signal, foghorn; siren; monitor, warning voice, Cassandra^†, signs of the times, Mother Cary's chickens^†, stormy petrel, bird of ill omen, gathering clouds, clouds in the horizon, death watch.    watchtower, beacon, signal post; lighthouse etc. (indication of locality) 550.    sentinel, sentry, , watch, watchman; watch and ward; watchdog, bandog^†, housedog^†; patrol, patrolman, vedette^†, picket, bivouac, scout, spy, spial^†; undercover agent, mole, plainclothesman; advanced guard, rear guard; lookout.    cautiousness etc. 864.    monitor, guard camera, radar, AWACS, spy satellite, spy-in-the-sky, U2 plane, spy plane.    ... show more

Dutch: radar
Polish: radar