1 libration | Definition of libration

libration

noun
li·​bra·​tion | \ lī-ˈbrā-shən How to pronounce libration (audio) \

Definition of libration

: an oscillation in the apparent aspect of a secondary body (such as a planet or a satellite) as seen from the primary object around which it revolves

Other Words from libration

librational \ lī-​ˈbrā-​shnəl How to pronounce librational (audio) , -​shə-​nᵊl \ adjective
libratory \ ˈlī-​brə-​ˌtȯr-​ē How to pronounce libratory (audio) \ adjective

First Known Use of libration

1667, in the meaning defined above

History and Etymology for libration

Latin libration-, libratio, from librare to balance, from libra scales

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More from Merriam-Webster on libration

Britannica.com: Encyclopedia article about libration