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siphuncle

[sahy-fuhng-kuh l]
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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.

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 -cule1 (see carbuncle)
Related formssi·phun·cu·lar, si·phun·cu·late [sahy-fuhng-kyuh-lit] /saɪˈfʌŋ kyə lɪt/, si·phun·cu·lat·ed [sahy-fuhng-kyuh-ley-tid] /saɪˈfʌŋ kyəˌleɪ tɪd/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Historical Examples