Definition from Wiktionary, the free dictionary
obturator (plural obturators)
- (surgery) An object used to obstruct a hole, such as a fissure of the palate.
- (engineering) Valve closure member (disk, gate, plug, etc.).
- (ordnance) Any device for preventing the escape of gas through the breech mechanism of a breech-loading gun; a gas check.
- (photography) A camera shutter.
- For the engineering sense: American Society of Mechanical Engineers (ASME) OM Code.