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  • dagger - weapon

    Weapon with a short, double-edged, sharp-pointed blade and a grip, used for stabbing or parrying.

  • DDT

    A synthetic pesticide used for controlling insects, especially mosquitoes that carry malaria. Its prolonged use is harmful to the environment, in particular to birds. Now banned from agriculture, it remains in use in some parts of the world.

  • deafness

    A condition where the hearing in both ears in not functional to ordinary levels.

  • death mask

    A cast taken of a person's face after death, usually made from plaster or wax.

  • decomposition

    The slow disintegration of dead organic matter by chemical reaction into simpler elements.

  • defibrillator

    A device that delivers a measured electric shock to the heart. Designed to prevent the irregular seizing of muscles in the heart (fibrillation). If the defibrillator is successful, the normal rhythm of the heart resumes.

  • dehydration

    The results of extreme loss of water.

  • dental burnisher

    An instrument for smoothing and polishing the surface or edge of a dental restoration.

  • dental drill

    A rotary power-driven instrument into which cutting points may be inserted. Used to remove decay from teeth.

  • dental elevator

    A dental instrument used to remove teeth or parts of teeth that cannot be gripped with forceps or to loosen teeth and roots before using dental forceps.

  • dental forceps

    Forceps used specifically to remove teeth.

  • dental instrument

    Hand-held tools or implements especially used by dental professionals for the performance of clinical tasks

  • dental instrument set

    Set of dental instruments

  • dental key

    Used in dentistry to remove diseased teeth. The dental key’s ‘claw’ would be tightened over a tooth. The instrument was then rotated to loosen the tooth. This often resulted in the tooth breaking, causing jaw fractures and soft tissue damage. It has been replaced by modern forceps.

  • dental pelican

    Used for extracting teeth sideways. Invented by Guy de Chauliac in the 1300s. It was used for tooth extraction before the use of dental keys.

  • dentistry

    The study, treatment and management of diseases affecting the mouth, jaws, gums, teeth and their supporting tissues.

  • dentist's chair

    Dentist's chairs are deeply reclining chairs to allow the dentist easy access to the patient's mouth. The reclining position adjusts as well as the overall height of the chair. Associated with the chair are usually a variety of dental equipment, often including a small tap and sink for the patient to rinse his or her mouth.

  • denture

    A replacement tooth, or set of teeth that are usually removable.

  • denture articulator

    a hinged frame that simulates jaw movements (source, upper wellcome label)

  • depilatory tweezers

    tweezers used for the plucking of body hair

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