[1] : The Collaborative International Dictionary of English v.0.48

obturator \ob"tura`tor\, n. nl., fr. l. obturare to stop up:
   cf. f. obturateur.
   1. that which closes or stops an opening.
      1913 webster

   2. surg. an apparatus designed to close an unnatural
      opening, as a fissure of the palate.
      1913 webster

   3. ordnance any device for preventing the escape of gas
      through the breech mechanism of a breech-loading gun; a
      gas check.
      webster 1913 suppl.

   4. photog. a camera shutter.
      webster 1913 suppl.

[2] : The Collaborative International Dictionary of English v.0.48

obturator \ob"tura`tor\, a. anat.
   serving as an obturator; closing an opening; pertaining to,
   or in the region of, the obturator foramen; as, the obturator
   nerve.
   1913 webster

   obturator foramen anat., an opening situated between the
      public and ischial parts of the innominate bone and closed
      by the obturator membrane; the thyroid foramen.
      1913 webster
see also:
obturator foramen 

[3] : WordNet (r) 2.0

obturator
     n : a prosthesis used to close an opening as to close an
         opening of the hard palate in cases of cleft palate

Obturator >> O Words
Obturator, definition of term: Obturator
obturator_pag1.html