siphuncle

American  

[sahy-fuhng-kuhl] / ˈsaɪ fʌŋ kəl /

noun

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. Entomology. an aphid cornicle.

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Other Word Forms

• siphuncular
  adjective
• siphunculate
  adjective
• siphunculated
  adjective

Etymology

Origin of siphuncle

1895–1900; < Latin sīp ( h ) unculus small tube through which water is forced, equivalent to sīp ( h ) ōn-, stem of sīp ( h ) ō siphon + -culus -cule ¹ ( see carbuncle)

Example Sentences

See Examples For:

siphuncle

Shell straight or slightly curved, with wide siphuncle contracted at level of septa.

From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" by Various

Shell slightly curved, aperture simple, siphuncle wide, septa approximated.

From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" by Various

The siphuncle does not communicate with the coelomic cavity; it is a simple vascular process of the mantle, whose cavity consists of a venous sinus, and whose wall contains a ramification of the pallial artery.

From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" by Various

In fossil genera and Spirula, shell has a multilocular phragmacone with a siphuncle; initial chamber globular and larger than the second chamber.

From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" by Various

An extinct genus of chambered shells, allied to the Ammonites, having the siphuncle near the dorsal margin.

From Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology by Sir Charles Lyell