1. (physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation
   - optical density, photographic density, absorbance

Type of: denseness, density

• subclass Copepoda
• subclass Crossopterygii
• subclass Diapsida
• subclass Dibranchia
• subclass Dibranchiata
• subclass Dilleniidae
• subclass Dipnoi
• subclass Discomycetes
• subclass Elasmobranchii
• subclass Entomostraca
• subclass Euascomycetes
• subclass Euryalida
• subclass Eutheria
• subclass Exopterygota
• subclass Hamamelidae
• subclass Heterobasidiomycetes
• homebound
• homeboy
• homebrew
• homebuilder
• homecoming
• homecourt advantage
• homefolk
• homegirl
• homegrown