noun The formation of an opacity; the process of rendering opaque.

What is an opacification?

Medical Definition of opacification

: an act or the process of becoming or rendering opaque opacification of the cornea opacification of the bile passages for radiographic examination.

What is the adjective of opacity?

adjective. not transparent or translucent; impenetrable to light; not allowing light to pass through. not transmitting radiation, sound, heat, etc. not shining or bright; dark; dull. hard to understand; not clear or lucid; obscure: The problem remains opaque despite explanations.