/ Dictionary / Index R Richardson ground squirrel: Meaning and Definition of Find definitions for: Rich'ardson ground' squir"rel Pronunciation: [key] a ground squirrel, Citellus richardsoni, of sagebrush and grassland areas of the northwestern U.S. and adjacent regions in Canada. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Richardson Richelieu Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language