/ Dictionary / Index C Christmas fern: Meaning and Definition of Find definitions for: Christ'mas fern" Pronunciation: [key] an evergreen fern, Polystichum acrostichoides, having dense clusters of stiff fronds growing from a central rootstock. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Christmas factor Christmas Island Related Content Daily Word Quiz: sumptuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language