出典:Wiktionary
出典:『Wiktionary』 (2026/04/04 17:15 UTC 版)
nutation (countable and uncountable, plural nutations)
出典:Wikipedia
出典:『Wikipedia』 (2011/05/07 21:45 UTC 版)
Nutation (from Latin: nūtāre, to nod) is a rocking, swaying, or nodding motion in the axis of rotation of a largely axially symmetric object, such as a gyroscope, planet, or bullet in flight, or as an intended behavior of a mechanism. A pure nutation is a movement of a rotational axis such that the first Euler angle (precession) is constant.
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a wrinkle
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a beggar