libration Hear it!

libration Definition

li·bra·tion (lī brās̸hən)

noun

  1. the act of librating
  2. Astron. a slight rocking motion of the moon which allows 59% of the moon's surface to be visible from the earth

Etymology: L libratio

libration Related Forms
li·bra·to′ry (-brə tôr′ē) adjective
libration Usage Examples

Converse of object

  • show: The capture clearly shows the libration spreading widening the signal ( a clear tone would show up as a narrow line ).

Adjective modifier

  • lunar: Lunar libration from the Astronomy Picture of the Day.

Browse dictionary entries near libration

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  10. libidinous
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