caduceus

noun2

1. •
   The official wand carried by a herald in ancient Greece and Rome, specifically the one carried in mythology by Hermes, the messenger of the gods, usually represented with two snakes twined around it.

   • Caduceus the rod of Mercury, / With which he wonts the Stygian realmes inuade […] — 1590
2. •
   A symbol (☤) representing a staff with two snakes wrapped around it, used to indicate merchants and messengers. It is also sometimes incorrectly substituted for the rod of Asclepius as a symbol of medicine.