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  • gunpowder van key

    A security key used to lock vehicles carrying explosives.

  • gynaecology

    A branch of medicine dealing with the treatment of disorders affecting the female reproductive system.

  • gyroscope

    A device to illustrate the dynamics of a rotating bod that consists of a rapidly rotating solid wheel mounted within a ring with its axis free to turn in any direction. Used, in modified form other other equipment, to provide a horizontal or vertical reference direction .

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