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Definition of "libration" [li•bra•tion]

  • A very slow oscillation, real or apparent, of a satellite as viewed from the larger celestial body around which it revolves. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "libration" in a sentence
  • "By this means the ship was able to penetrate the so-called libration zone, which was a semispace continuum lying between the 4th and 5th-dimensional universes."
  • "The moon really undergoes considerable libration, recalling the libration of"
  • "This produces the phenomenon that is called libration, the result of which is that, along the border between the day and night hemispheres there is a narrow strip where the sun rises and sets once in each of her years, which are about two hundred and twenty-five of our days in length."
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