/ Dictionary / Index S spiny dormouse: Meaning and Definition of Find definitions for: spin'y dor'mouse Pronunciation: [key] a rat-sized rodent, Platacanthomys lasiurus, native to rocky hills of southern India, having reddish-brown fur and sharp, flat spines. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spiny dogfish spiny-finned 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