Syringe:Amedical devicethat is used to inject fluid into, or withdraw fluid from, the body. A medicalsyringeconsists of a needle attached to a hollow cylinder that is fitted with a sliding plunger. The downward movement of the plunger injects fluid; upward movement withdraws fluid. Medical syringes were once made of metal or glass, and required cleaning and sterilization before they could be used again. Now most syringes usedinmedicine areplasticand disposable.
