noun
1. : one of many variations in the moon's motion from a true ellipse caused by the perturbation of the sun or the planets
2. : one of the nearly inappreciable fluctuations of the magnetic needle from its mean position due apparently to the moon
noun
1. : one of many variations in the moon's motion from a true ellipse caused by the perturbation of the sun or the planets
2. : one of the nearly inappreciable fluctuations of the magnetic needle from its mean position due apparently to the moon
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012