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si·phun·cle

(sīfŭng′kəl)

A tubelike structure in the body of a shelled cephalopod, such as a nautilus, extending through each chamber of the shell.

[Latin sīphunculus, diminutive of sīphō, sīphōn-, siphon; see SIPHON.]

si·phuncu·lar (-kyə-lər), si·phuncu·late (-lĭt) adj.

Indo-European & Semitic Roots Appendices

Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

Indo-European Roots

Semitic Roots

The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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