/ Dictionary / Index S sycon: Meaning and Definition of Find definitions for: sy•con Pronunciation: (sī'kon), [key] — n. a type of sponge having a thick body wall that is folded to form many short canals leading to the spongocoel. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sycee syconium Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language