/ Dictionary / Index P propylhexedrine: Meaning and Definition of Find definitions for: pro•pyl•hex•e•drine Pronunciation: (prō"pil-hek'si-drēn"), [key] — n. Pharm. a colorless, adrenergic, water-soluble liquid, CHN, used by inhalation as a nasal decongestant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. propyl group propylic Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language