/ Dictionary / Index H Hartline: Meaning and Definition of Find definitions for: Hart•line Pronunciation: (härt'līn), [key] 1903–83, U.S. physiologist: Nobel prize for medicine 1967. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Hartley Hartmann Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language