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rotation axis

American

noun

Crystallography.

an imaginary line through a crystal about which the crystal may be rotated a specified number of degrees and be brought back to its original position.

Etymology

Origin of rotation axis

First recorded in 1900–05

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Their analysis showed that the star's rotation axis and the planet's orbital axis differ by roughly 62°, meaning TOI-3884 hosts a significantly tilted planetary orbit.

From Science Daily • Dec. 4, 2025

"Most are not aware that the rotation axis wobbles and has drifted from North Geographic pole in the last 123 years by 10-15 meters," Wilson told Salon.

From Salon • Jun. 21, 2023

Saturn’s field, on the other hand, is perfectly aligned with its rotation axis.

From Textbooks • Oct. 13, 2016

Over time, our orbit twists and flexes under the perturbation of the other planets, and the Earth’s rotation axis nods back and forth.

From Slate • Oct. 2, 2013

The lander will carry four instruments, which will determine Mars' rotation axis and measure the seismic waves and heat flowing through and from the planet's interior.

From Scientific American • Aug. 21, 2012

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023