doppler
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A surname from German
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Ellipsis of Doppler ultrasonography. [Any of various types of ultrasonography that use the Doppler effect.]
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(meteorology, military, by ellipsis, informal) Ellipsis of Doppler radar. [(chiefly meteorology) A radar system using the Doppler effect to measure the radial velocity of detected objects, allowing moving objects (such as airplanes, precipitation, missiles, etc.) to be distinguished from stationary ones and classified by magnitude and direction of their velocity towards or away from the radar site.]
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(medicine, by ellipsis, informal) Ellipsis of Doppler ultrasonography: Any of various types of ultrasonography that use the Doppler effect; especially, medical versions thereof. [Any of various types of ultrasonography that use the Doppler effect.]
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(fishing, military, by ellipsis, informal) Ellipsis of Doppler sonar. [A form of sonar that uses the Doppler effect to detect moving underwater objects; used especially by fishermen.]
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(informal) To travel while emitting a sound that changes pitch due to the Doppler effect.
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