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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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| As a less radical alternative to Young's procedure, individually molded Silastic obturators have been placed in the nasal vestibules for the treatment of atrophic rhinitis (9) and epistaxis secondary to coagulation deficiency (Bernard-Soulier syndrome). Interadductor approach to obturator nerve blockade for spastic conditions of adductor thigh muscles. In conjunction with the slipping obturator, the canards will reduce the "roll-rate" or spin of the projectile. |
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