/ Dictionary / Index T thirteen-lined ground squirrel: Meaning and Definition of Find definitions for: thir'teen-lined' ground' squir"rel Pronunciation: (thûr'tēn"līnd'), [key] a brownish ground squirrel, Citellus tridecemlineatus, of prairie regions of the U.S., having cream-colored stripes extending along its back and sides. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thirteen thirteenth Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language