obturator

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obturator

[′äb·tə‚rād·ər]
(anatomy)
Pertaining to that which closes or stops up, as an obturator membrane.
Either of two muscles, originating at the pubis and ischium, which rotate the femur laterally.
(medicine)
A solid wire or rod contained within a hollow needle or cannula.
(ordnance)
Assembly of steel spindle, mushroom head, obturator rings, and a gas-check or obturator pad of tough plastic material used as a seal to prevent the escape of propellant gases around the breechblock of guns using separate-loading ammunition, and therefore not having the obturation provided by a cartridge case.
A device incorporated in a projectile to make the tube of a weapon gastight, preventing escape of gas until the projectile has left the muzzle of the weapon.
References in periodicals archive ?
Similarly, a positive obturator sign of hypogastric pain on stretching the obturator internus indicates irritation in the pelvis which is performed by passive internal rotation of the flexed right thigh with the patient supine.
Gary Hals et al [20] in 2010 noted that right iliac fossa tenderness was noted to be present in 77% of elderly patients and only two-thirds (33.3%) have rebound tenderness and the classic psoas and obturator signs are absent in 85%-90% of exams.
The patient also has positive psoas and obturator signs. She has hypoactive bowel sounds in all four quadrants.