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Medical Term:


Pronunciation: fĕ-nes′tră, -trē


  1. An anatomic aperture, often closed by a membrane.
  2. An opening left in a plaster of Paris cast or other form of fixed dressing to permit access to a wound or inspection of the part.
  3. The opening in one of the blades of an obstetric forceps.
  4. A lateral opening in the sheath of an endoscopic instrument that allows lateral viewing or operative maneuvering.
  5. Openings in the wall of a tube, catheter, or trocar designed to promote better flow of air or fluids.

Synonym(s): window1

[L. window]