/ Dictionary / Index S spiny-finned: Meaning and Definition of Find definitions for: spin•y-finned Pronunciation: (spī'nē-find'), [key] — adj. Ichthyol. having fins with sharp bony rays, as an acanthopterygian. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: spiny-finned (Thesaurus) spiny dormouse spiny-headed worm Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language