Doppler

American  

[dop-ler] / ˈdɒp lər /

noun

1. Christian Johann, 1803–53, Austrian physicist: discovered the Doppler effect.

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Doppler Scientific  

/ dŏp′lər /

1. Austrian physicist and astronomer who in 1842 explained the effect, now named for him, of variations in the frequency of waves as a result of the relative motion of the wave source with respect to the observer.

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Example Sentences

Bilateral lower extremity venous Doppler ultrasounds were performed and revealed chronic venous insufficiency, a benign and common condition, particularly in individuals over the age of 70.

From Slate • Jul. 18, 2025

Lines in the spectrum regularly shifted back and forth, suggesting the star was being tugged by an orbiting companion, Doppler shifting the light.

From Science Magazine • Dec. 3, 2024

Deep Sea Vision had first put to sea in September 2023 from Papua New Guinea, launching a $9-million Hugin 6000 submersible equipped with a Doppler, a magnetometer, an echo sounder and a side-scan sonar.

From Los Angeles Times • Nov. 8, 2024

Their Earthcare satellite used a Doppler radar to capture the view.

From BBC • Jun. 27, 2024

The stars Slipher looked at showed unmistakable signs of a Doppler shift*–the same mechanism behind that distinctive stretched-out yee-yummm sound cars make as they flash past on a racetrack.

From "A Short History of Nearly Everything" by Bill Bryson