/ Dictionary / Index C cycadaceous: Meaning and Definition of Find definitions for: cy•ca•da•ceous Pronunciation: (sī"ku-dā'shus, sik"u), [key] — adj. belonging or pertaining to the order Cycadales. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cycad cycas Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language