/ Dictionary / Index P primulaceous: Meaning and Definition of Find definitions for: prim•u•la•ceous Pronunciation: (prim"yu-lā'shus), [key] — adj. belonging to the plant family Primulaceae. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. primula primum mobile* Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language