A syringe is a simple piston pump consisting of a plunger that fits tightly in a tube. This tag is used to describe a hypodermic needle, which is a hollow needle commonly used to inject substances into the body or used to take liquid samples from the body. However, the needle portion itself need not be present for the tag to qualify.
Syringes are called needles in some areas of the world, but on Danbooru, needles refer to the thin stick of pointed metal used for sewing or as weapons.
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