Obturator

Part of speech: noun (n.)

1. That which closes or stops an opening.

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

Part of speech: adjective (a.)

Serving as an obturator; closing an opening; pertaining to, or in the region of, the obturator foramen; as, the obturator nerve. 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.