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

• archangel
• archangelic
• archangelical
• archbishop
• archbishopric
• archdeacon
• archdeaconry
• archdiocesan
• archdiocese
• archducal
• archduchess
• archduchy
• archduke
• archean
• Archean aeon
• Archean eon
• arched
• archegonial
• archegoniate
• archegonium
• archenemy
• commercial artist
• commercial bank
• commercial bribery
• commercial credit