/ Dictionary / Index R rock blenny: Meaning and Definition of Find definitions for: rock' blen"ny. Pronunciation: [key] a prickleback, Xiphister mucosus, of the Pacific coast from southern California to Alaska. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rock beauty rock bolt Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language