Bible Encyclopedias
Libration

The Nuttall Encyclopedia

The name given to certain apparent movements in the moon as if it swayed like a balance both in latitude and longitude in its revolution round the earth.

Bibliography Information
Wood, James, ed. Entry for 'Libration'. The Nuttall Encyclopedia. https://www.studylight.org/​encyclopedias/​eng/​nut/​l/libration.html. Frederick Warne & Co Ltd. London. 1900.