obturator (redirected from Obturator muscles)

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.