/ Dictionary / Index J juncaceous: Meaning and Definition of Find definitions for: jun•ca•ceous Pronunciation: ( jung-kā'shus), [key] — adj. belonging to the plant family Juncaceae. Cf. rush family. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Junc. junco Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language