/ Dictionary / Index P pulvinus: Meaning and Definition of Find definitions for: pul•vi•nus Pronunciation: (pul-vī'nus), [key] — pl. -ni a cushionlike swelling at the base of a leaf or leaflet, at the point of junction with the axis. pulvinar (def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pulvinate puma 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