plural of OPAC

(chemistry) a chemical agent added to a material, such as rocket propellant, to make it opaque / (figuratively) an extraneous agent or vehicle which, intentionally otherwise, makes something opaque

simple past tense and past participle of opacify

present participle of opacify

Third-person singular simple present indicative form of opacify

plural of opacifier

(transitive) To make opaque.

The action of making something opaque or cloudy

plural of opacification

(obsolete) opaque