/ Dictionary / Index H Hertzsprung-Russell diagram: Meaning and Definition of Find definitions for: Hertz'sprung-Rus'sell di"agram Pronunciation: (hârt'sproong-rus'ul), [key] — Astron. Astron. the graph showing the absolute magnitude plotted against the surface temperature for a group of stars. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Hertzog Herzberg Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language