- (in a nautilus) the connecting tube that passes from the end of the body through all of the septa to the innermost chamber.
- Entomology. an aphid cornicle.
Origin of siphuncle
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for siphuncle
In Ammonoids the siphuncle is always marginal, and usually external.
It is peculiar to the louse tribe (Pediculid), and it consists of the tubulet (Tubulus), and siphuncle (Siphunculus).An Introduction to Entomology: Vol. III (of 4)
The siphuncle in the Nautilus pierces the centres of the septa, and in fossil Nautiloids it is usually central or sub-central.
Shell straight or curved, fusiform, aperture simple, siphuncle contracted at septa.
Shell slightly curved, aperture simple, siphuncle wide, septa approximated.