/ Dictionary / Index B bladder fern: Meaning and Definition of Find definitions for: blad'der fern" Pronunciation: [key] any of several ferns of the genus Cystopteris, having pinnate leaves and growing in rocky areas. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bladder campion bladder kelp Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language