what is the obturator
obturator â(plural obturators) ( 1 surgery) An object used to obstruct a hole, such as a fissure of the palate. ( 2 engineering) Valve closure member (disk, gate, plug, etc.). ( 3 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.