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Pronunciation: plan


  1. A two-dimensional flat surface.
  2. An imaginary surface formed by extension of a point through any axis or two definite points, in reference especially to craniometry and to pelvimetry.

See: planum

Synonym(s): planum

[L. planus, flat]

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.