/ Dictionary / Index S stegosaur: Meaning and Definition of Find definitions for: steg•o•saur Pronunciation: (steg'u-sôr"), [key] — n. a plant-eating dinosaur of the genus Stegosaurus, from the Jurassic and Cretaceous periods, having a heavy, bony armor and a row of bony plates along its back, and growing to a length of 20 to 40 ft. (6–12 m). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: stegosaur (Thesaurus) stegodon Steichen Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language