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 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

The tube or siphuncle Page 238 which runs through the air-chambers is placed on the dorsal or convex side of the shell; but the principal character which distinguishes Ammonites from Goniatites and Fig.

From The Ancient Life History of the Earth A Comprehensive Outline of the Principles and Leading Facts of Palæontological Science by Nicholson, Henry Alleyne

Extinct; phragmacone short with ventral siphuncle, prolonged dorsally into long pro�stracum; rostrum large and cylindrical.

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

Shell straight, with wide margina siphuncle, necks produced into tubes fitting into one another.

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