Word:   
Definitions of undulation:
  • noun:   wave-like motion; a gentle rising and falling in the manner of waves
  • noun:   (physics) a movement up and down or back and forth
  • noun:   an undulating curve

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Search for undulation at other dictionaries: OneLook, Oxford, American Heritage, Merriam-Webster, Wikipedia

See undulation used in context: 2 rhymes, several books and articles.

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