Caduceus

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Caduceus

a staff with two oppositely twined serpents and surmounted by two wings; emblem of the U.S. Army medical corps. For veterinary medicine the double serpent was changed in 1972 to its present form with a single serpent.

See: staff of aesculapius.

Origin: L. The staff of Mercury; g. Keryx herald, the staff of hermes