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  • Webster's Revised Unabridged Dictionary
    • n Siphuncle (Zoöl) The tube which runs through the partitions of chambered cephalopod shells.
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Century Dictionary and Cyclopedia
    • n siphuncle In zoöl:
    • n siphuncle A siphon; especially, the siphon or funnel of tetrabranchiate cephalopods, between the chambers of the shell which it connects. See cut under Tetrabranchiata.
    • n siphuncle In entomology, same as nectary, 2. Also called cornicle, honey-tube, siphonet, and siphunculus.
    • n siphuncle In the cephalopods, the calcareous tubular wail of the siphon.
    • n siphuncle The protrusible portion of the mouth-parts of a true louse, supposed to be modifications of the epipharynx and hypopharynx.
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Chambers's Twentieth Century Dictionary
    • Siphuncle the siphon or funnel of tetrabranchiate cephalopods: a nectary
    • ***


Webster's Revised Unabridged Dictionary
L. siphunculus, sipunculus, dim. of sipho,. See Siphon
Chambers's Twentieth Century Dictionary
Fr.,—Gr., siphōnsiphlos, hollow.


In literature:

Nectaries: honey-tubes, cornicles, siphuncles; q.v.
"Explanation of Terms Used in Entomology" by John. B. Smith
An extinct genus of chambered shells, allied to the Ammonites, having the siphuncle near the dorsal margin.
"Principles of Geology" by Charles Lyell
In Ammonoids the siphuncle is always marginal, and usually external.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6" by Various