siphuncle: Meaning and Definition of

si•phun•cle

Pronunciation: (sī'fung-kul), [key]
— n.
  1. (in a nautilus) the connecting tube that passes from the end of the body through all of the septa to the innermost chamber.
  2. an aphid cornicle.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.