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

• lemon-scented gum
• lemon-wood tree
• lemonade
• lemonade mix
• lemongrass
• lemongrass oil
• lemonlike
• lemonwood
• lemony
• lempira
• lemur
• Lemur catta
• Lemuria
• Lemuridae
• Lemuroidea
• Lena
• Lena Calhoun Horne
• Lena Horne
• Lena River
• Lenard
• lend
• lend oneself
• lend-lease
• lendable
• lender