radial motion

American  

[rey-dee-uhl moh-shuhn] / ˈreɪ di əl ˈmoʊ ʃən /

noun

Astronomy.

1. the component of the motion of a star away from or toward the earth along its line of sight, expressed in miles or kilometers per second and determined by the shift in the wavelength of light emitted by the star.

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Etymology

Origin of radial motion

First recorded in 1880–85

Example Sentences

The divisions were cut, while the screw was stationary, by means of a dividing knife attached to a swing frame, which allowed it to have only a radial motion.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" by Various

Keeler's were the first trustworthy determinations of radial motion obtained visually.

From A Popular History of Astronomy During the Nineteenth Century Fourth Edition by Clerke, Agnes M. (Agnes Mary)

One chaser only is capable of radial motion for adjusting the diameter of thread the die will cut, and this chaser is adjusted and set by a screw in the periphery of the collet.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua