/ Dictionary / Index P phrenic: Meaning and Definition of Find definitions for: phren•ic Pronunciation: (fren'ik), [key] — adj. of or pertaining to the diaphragm. relating to the mind or mental activity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: phrenic (Thesaurus) -phrenia phrenitis Related Content Daily Word Quiz: topography Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language