/ Dictionary / Index S setaceous: Meaning and Definition of Find definitions for: se•ta•ceous Pronunciation: (si-tā'shus), [key] — adj. bristlelike; bristle-shaped. having bristles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: setaceous (Thesaurus) seta setaria Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language