/ Dictionary / Index B brittle star: Meaning and Definition of Find definitions for: brit'tle star" Pronunciation: [key] any echinoderm of the class Ophiuroidea, having the body composed of a central, rounded disk from which radiate long, slender, fragile arms. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. brittle fern Britton 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