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  Word: Umbilicus

  ID	Word	Wordtype	Definition
  164546	Umbilicus	n.	A point of a surface at which the curvatures of the normal sections are all equal to each other. A sphere may be osculatory to the surface in every direction at an umbilicus. Called also umbilic.

  
  

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  Syllepsis | squireship | Trigonal | Spot | Jutting |