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18.222.20.30
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2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Re·en·ter, v. i. To enter anew or again.
 Reentering angle, an angle of a polygon pointing inward, as a, in the cut.
 Reentering polygon, a polygon having one or more reentering angles.
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From: WordNet (r) 2.0

 reentering angle
      n : an interior angle of a polygon that is greater than 180
          degrees [syn: reentrant angle] [ant: salient angle]