Opacity

[oh-pas-i-tee] /oʊˈpæs ɪ ti/

noun, plural opacities.
1.
the state or quality of being .
2.
something .
3.
the degree to which a substance is ; capacity for being .
4.
Photography. the proportion of the light that is absorbed by the emulsion on any given area of a film or plate.
5.
obscurity of meaning.
6.
mental dullness.
7.
Medicine/Medical. an spot or area in normally clear or transparent tissue, as a cataract of the eye.
/əʊˈpæsɪtɪ/
noun (pl) -ties
1.
the state or quality of being opaque
2.
the degree to which something is opaque
3.
an opaque object or substance
4.
obscurity of meaning; unintelligibility
5.
(physics, photog) the ratio of the intensity of light incident on a medium, such as a photographic film, to that transmitted through the medium
6.
(logic, philosophy) the property of being an opaque context
n.

1550s, “darkness of meaning, obscurity,” from French opacité, from Latin opacitatem (nominative opacitas) “shade, shadiness,” from opacus “shaded, dark, opaque” (see opaque). The literal sense “condition of being impervious to light” first recorded 1630s.

opacity o·pac·i·ty (ō-pās’ĭ-tē)
n.