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

Type of: denseness, density

• Coats Land
• coattail
• coattails effect
• coauthor
• coax
• coax cable
• coaxal
• coaxer
• coaxial
• coaxial cable
• coaxing
• coaxingly
• cob
• cobalamin
• cobalt
• cobalt 60
• cobalt bloom
• cobalt blue
• cobalt ultramarine
• cobaltic
• cobaltite
• cobber
• cobble
• cobble together
• cobble up