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

• ski cap
• ski conditions
• ski jacket
• ski jump
• ski jumper
• ski jumping
• ski lift
• ski lodge
• ski mask
• ski parka
• ski pole
• ski race
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• ski resort
• ski run
• ski slope
• ski tow
• ski trail
• ski wax
• ski-plane
• skiagram
• skiagraph
• skiagraphy
• skibob
• skid