1. (astronomy) a plot of the absolute magnitude of stars versus their colour (or effective temperature); shows the main sequence of stars plus the white dwarfs and red giants
   - Hertzsprung-Russell diagram, color-magnitude diagram [US]

Encyclopedia: Color-magnitude diagram

• double-quick
• double-reed instrument
• double-space
• double-spaced
• double-spacing
• double-team
• double-tongued
• double-u
• doubled
• doubleheader
• doubler
• doubles
• doublespeak
• doublet
• doublethink
• doubleton
• doubletree
• doubling
• doubloon
• doubly
• doubly transitive verb
• doubly transitive verb form
• doubt
• doubtable
• doubter