means a tube fitted with a plunger and usually a needle, used to inject or withdraw fluids from the body.

from From Greek syrinx, 'pipe, tube, or shepherd's reed-flute' — the same word behind the panpipe. In the myth, Syrinx was a nymph who fled the god Pan and was turned into hollow reeds; he cut them and bound them into his flute. The word traveled through Latin syringa into medical use, and that ancient hollow reed eventually became the hollow steel of the modern injector.