/ Dictionary / Index S spiny rat: Meaning and Definition of Find definitions for: spin'y rat' Pronunciation: [key] any of various ratlike rodents of the genus Echimys, inhabiting forests of Central and South America, most having bristly fur. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spiny lobster spiny-rayed fish Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language