/ Dictionary / Index S siphonophore: Meaning and Definition of Find definitions for: si•pho•no•phore Pronunciation: (sī'fu-nu-fôr", -fōr", sī-fon'u-), [key] — n. any pelagic hydrozoan of the order Siphonophora, being a floating or swimming colony composed of polyps. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: siphonophore (Thesaurus) siphono- siphonostele 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