Nutation

Nutation, name given to a slight oscillatory movement noticeable in the celestial pole of the earth, due to the latter not being a perfect sphere.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Nüremberg * Nyanza, Albert
Nubia
Numa Pompilius
Numantia
Numbers, Book of
Numidia
Numismatics
Numitor
Nuneaton
Nur ed-Din, Mahmoud
Nüremberg
Nutation
Nyanza, Albert
Nyanza, Victoria
Nyassa, Lake
Nyassaland
Nyâya
Nymphs
Nynee Tal
Nyx
Oakham
Oakland

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Alembert, John Le Rond D'