angular defect

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noun
  1. 1

    (geometry, non-Euclidean geometry) The amount by which the sum of the interior angles of a triangle is less than 180° (π radians); the amount by which the sum of the internal angles of a polygon is less than what would be expected on the Euclidean plane.

  2. 2

    (geometry) The amount by which the total of the angles around a vertex of a polyhedron is less than 360° (2π radians).

  3. 3

    (dentistry, periodontics) The angular displacement of a tooth from vertical.

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