Obturator /(?)/

Ob·tu·ra·tor

Obturator

n.
  1. That which closes or stops an opening.
  2. An apparatus designed to close an unnatural opening, as a fissure of the palate. (Surg.)
  3. Any device for preventing the escape of gas through the breech mechanism of a breech-loading gun; a gas check. (Ordnance)
  4. A camera shutter. (Photog.)

Obturator

a.
  1. Serving as an obturator; closing an opening; pertaining to, or in the region of, the obturator foramen; as, the obturator nerve. (Anat.)

Phrases & Compounds
Obturator foramen
an opening situated between the public and ischial parts of the innominate bone and closed by the obturator membrane; the thyroid foramen.