/ Dictionary / Index B brittle fern: Meaning and Definition of Find definitions for: brit'tle fern' Pronunciation: [key] a fern, Cystopteris fragilis, of rocky, wooded areas throughout North America, having grayish-green fronds and brittle stalks. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. brittlebush brittle star 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