/ Dictionary / Index S siphuncle: Meaning and Definition of Find definitions for: si•phun•cle Pronunciation: (sī'fung-kul), [key] — n. (in a nautilus) the connecting tube that passes from the end of the body through all of the septa to the innermost chamber. an aphid cornicle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Siphrei Torah* sipid Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language