/ Dictionary / Index P plantigrade: Meaning and Definition of Find definitions for: plan•ti•grade Pronunciation: (plan'ti-grād"), [key] — adj. walking on the whole sole of the foot, as humans, and bears. —n. a plantigrade animal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: plantigrade (Thesaurus) planthopper Plantin Related Content Daily Word Quiz: apogee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language