/ Dictionary / Index P popliteus: Meaning and Definition of Find definitions for: pop•lit•e•us Pronunciation: (pop-lit'ē-us, pop"li-tē'-), [key] — pl. -lit•e•i a thin, flat, triangular muscle in back of the knee, the action of which assists in bending the knee and in rotating the leg toward the body. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. popliteal Popocatepetl Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language