obturator

Etymology
From.

Noun

 * 1)  An object used to obstruct a hole, such as a fissure of the palate.
 * 2)  The membrane vessels, etc. that close the obturator foramen, or thyroid foramen, a large opening or fenestra in the anterior part of the hip bone.
 * 3)  A valve closure member (disk, gate, plug, etc.).
 * 4)  Any device for preventing the escape of gas through the breech mechanism of a breech-loading gun; a gas check.
 * 5)  A camera shutter.

Etymology
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Noun

 * 1)  shutter