opaque

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opaque

1. not transmitting radiant energy, such as electromagnetic or corpuscular radiation, or sound
2. Photog an opaque pigment used to block out particular areas on a negative

opaque

Impervious to the transmission of visible light.
References in periodicals archive ?
Using Opaquers under Direct Composite Resin Veneers: An Illustrated Review of the Technique.
Here, dentin bonding agents, color modifiers and opaquers, resins, ceramometal, porcelain, and acrylic materials are compared.