Aaron's rod

noun7

1. •
   Any of various plants with a tall flowering stem.
2. •
   Verbascum thapsus, the great mullein, common mullein, or hag-taper.
3. •
   Goldenrod, the Solidago genus of North American plants with yellow flowers.
4. •
   Hylotelephium telephium (syn. Sedum telephium; orpine, livelong, or live-forever).
5. •
   A rod-shaped molding decorated with an entwined snake, and sometimes leaves, vines, or scrolls.
6. •
   (slang, old-fashioned) The penis.
7. •
   (no longer used) A rod with one serpent twined around it, as used by Aaron (differing from the caduceus of Mercury, which has two serpents).