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

• cataloguer
• Catalonia
• catalpa
• Catalpa bignioides
• Catalpa speciosa
• catalufa
• catalyse
• catalysis
• catalyst
• catalytic
• catalytic converter
• catalytic cracker
• catalytically
• catalyze
• catamaran
• catamenia
• catamenial
• catamite
• catamount
• catamountain
• catananche
• Catananche caerulea
• cataphasia
• cataphatic
• cataphatism