/ Dictionary / Index I internal medicine: Meaning and Definition of Find definitions for: inter'nal med'icine Pronunciation: [key] the branch of medicine dealing with the diagnosis and nonsurgical treatment of diseases, esp. of internal organ systems. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. internal jugular vein internal reconstruction Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language