So, what exactly is a caduceus? So good that you asked! It is basically a staff decorated with two entwined serpents. I’m guessing you have seen a contemporary version of the caduceus at some point. Say, in a doctor’s office.
This strange symbol originated long ago, and yes, there is a connection to myth. Indeed, the caduceus is one of the symbols of Hermes. You remember Hermes - he is the messenger god in Greek mythology after all. Or perhaps the Roman name Mercury is more familiar.
Incidentally, the Greek word for this herald’s staff is kerykeion.