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

• Arctiidae
• Arctium
• Arctium lappa
• Arctium minus
• Arctocebus
• Arctocebus calabarensis
• Arctocephalus
• chains
• chainsaw
• chair
• chair car
• chair of state
• chairlift
• chairman
• chairman of the board
• chairmanship
• chairperson
• chairwoman
• chaise
• chaise longue
• Chait
• chaja
• chakra
• chalaza
• chalazion