Caduceus

n. staff with two snakes (symbol of the medical profession)

A caduceus (; kerykeion in Greek is a (sometimes) winged staff with two snakes wrapped around it. It was an ancient astrological symbol of commerce and is associated with the Greek god Hermes, the messenger for the gods, conductor of the dead and protector of merchants and thieves. It was originally a herald's staff, sometimes with wings, with two white ribbons attached. The ribbons eventually evolved into snakes. It is sometimes mistakenly used as a symbol for medicine, by those confusing it with the rod of Asclepius, which features only a single snake and no wings.
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Noun
1. an insignia used by the medical profession; modeled after the staff of Hermes
(hypernym) insignia

(n.)
The official staff or wand of Hermes or Mercury, the messenger of the gods. It was originally said to be a herald's staff of olive wood, but was afterwards fabled to have two serpents coiled about it, and two wings at the top.
  

[Greek] The herald's staff or wand of Hermes. It is usually depicted as a winged rod with two serpents intertwined about it. As a group of fertility symbols, it is emblematic of the magic potency of the deity, and of the prosperity of peace.