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

The siphuncle in the Nautilus pierces the centres of the septa, and in fossil Nautiloids it is usually central or sub-central.

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

The dotted line shows the position of the siphuncle.

From The Chain of Life in Geological Time A Sketch of the Origin and Succession of Animals and Plants by Dawson, Sir J. William

Like that of Nautilus it is divided by septa and traversed by a siphuncle.

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

Shell straight, conical, siphuncle narrow and marginal, necks long, infundibuliform, sutures undulating.

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

In many fossil forms these septal necks are continued from the septum from which they arise to the next, so that the siphuncle is enclosed in a complete secondary calcareous tube.

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