What is Stalk?

Stalk definition and meaning on Dictionary terms:
the stem or main axis of a plant.
any slender supporting or connecting part of a plant, as the petiole of a leaf, the peduncle of a flower, or the funicle of an ovule.
a similar structural part of an animal.
a stem, shaft, or slender supporting part of anything.
Automotive. a slender lever, usually mounted on or near the steering wheel, that is used by the driver to control a signal or function: The horn button is on the turn-signal stalk.