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Pronunciation: pro-la'be-um


  1. The exposed carmine margin of the lip.
  2. The isolated central soft-tissue segment of the upper lip in the embryonic state and in an unrepaired bilateral cleft lip and palate.

[pro- + L. labium, lip]

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