1. The phenomenon of not permitting the passage of electromagnetic radiation 
2. Incomprehensibility resulting from obscurity of meaning
   - opaqueness 
3. The quality of being opaque to a degree; the degree to which something reduces the passage of light
   - opaqueness

Derived forms: opacities

See also: opaque

Type of: incomprehensibility, physical phenomenon, quality

Antonym: clarity, transparency

Encyclopedia: Opacity

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• dichloromethane
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• dichotomisation
• dichotomise
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