| 单词 | nutation |
| 释义 | Word Frequency nutation(njuːˈteɪʃən) noun 1. astronomy a periodic variation in the precession of the earth's axis causing the earth's poles to oscillate about their mean position 2. physics a periodic variation in the uniform precession of the axis of any spinning body, such as a gyroscope, about the horizontal 3. Also called: circumnutation the spiral growth of a shoot, tendril, or similar plant organ, caused by variation in the growth rate in different parts 4. the act or an instance of nodding the head Derived forms nutational (nuˈtational) adjective Word origin C17: from Latin nutātiō, from nūtāre to nod |
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