rotation

Reading level: hard

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun the act of rotating as if on an axis
noun (mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin
noun a single complete turn (axial or orbital)

Borrowed from Latin rotātiō. By surface analysis, rotate + -ion.

This they studied secretly in rotation. — Some Jewish Witnesses For Christ, Aaron Bernstein
You stop the rotation of the earth, you know. — Tales of Space and Time, H. G. (Herbert George) Wells
And the world was round because of its rotation. — Astounding Stories, May, 1931, Various

rotary motion

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