What symbol represents being precise?

What is that symbol of a snake curling around the staff that you can see in hospitals represents?

• If you see an ambulance or go to a hospital, the usually have a symbol of a snake curling around a staff. What does that symbol means?

• Answer:

  It is called caduceus. It is the time-honored, yet incorrect, symbol of medicine and art of healing, depicted by two serpents coiled around a winged staff. Cf Æsculapian staff. McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 Caduceus is the wand of Hermes or Mercury consisting of a winged staff with two serpents entwined; used as a symbol of the medical profession and as the emblem of most military Medical Corps. Another symbol of medicine is the staff of Æsculapius, which is the official insignia of the American Medical Association. The American Veterinary Medical Association uses a modification of the caduceus as an emblem. The staff is unwinged, there is a single serpent instead of two, and a large V is imprinted over the whole. An adaptation of the caduceus, with only one snake winding itself around the staff is the emblem of the Veterinary Corps of the US Army.staff of Aesculapius the rod or staff with entwining snake, symbolic of the god of healing, official insignia of the American Medical Association.