opacity


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opacity

 [o-pas´ĭ-te]
1. the condition of being opaque.
2. an opaque area.

o·pac·i·ty

(ō-pas'i-tē),
1. A lack of transparency; an opaque or nontransparent area.
2. On a radiograph, a more transparent area is interpreted as an opacity to x-rays in the body.
3. Mental dullness.
[L. opacitas, shadiness]

opacity

/opac·i·ty/ (o-pas´it-e)
1. the condition of being opaque.
2. an opaque area.

opacity

[ōpas′itē]
Etymology: L, opacitus, shadiness
pertaining to an opaque quality of a substance or object, such as cataract opacity.

opacity

Medtalk A clouded or opaque area. See Corneal opacity.

o·pac·i·ty

(ō-pas'i-tē)
1. A lack of transparency; an opaque or nontransparent area.
2. On a radiograph, a more transparent area is interpreted as an opacity to x-rays in the body.
3. Mental dullness.
[L. opacitas, shadiness]

opacity 

The condition of a tissue or structure which is not transparent, or being opaque. The location of an opacity within the eye can be determined with a slit-lamp. It can also be determined using an ophthalmoscope and asking the patient to look up or down. If the opacity moves very little, or not at all, it is situated in the lens. If the opacity moves in the same direction as the eye it is situated in front of the lens and if it moves in the opposite direction it is situated in the vitreous humour. See cataract; muscae volitantes; corneal ulcer.

o·pac·i·ty

(ō-pas'i-tē)
1. On a radiograph, a more transparent area is interpreted as an opacity to x-rays in the body.
2. A lack of transparency.
[L. opacitas, shadiness]

opacity

1. the condition of being opaque, e.g. corneal opacity, lenticular opacity.
2. an opaque area.
3. radiopacity is the capacity of a substance to absorb radiation, rather than permit its passage.
References in periodicals archive ?
Figure 4 shows the opacity and particle size results obtained with DETA.
Another factor to consider for maximizing opacity is optimum dispersion of the pigment particles in the paint.
One way of increasing the opacity of calcium carbonate is to increase its reflection, which can be achieved by understanding the surface area.
Stellar opacity involves the removal of energy from a beam of photons originating in the core of the Sun through four mechanisms: 1) bound-bound, 2) bound-free, 3) free-free, and 4) scattering processes (see [41, p.
Q If I am conducting a particulate matter or total metal HAP performance test to meet Foundry Area Source Rule requirements, must I always conduct an opacity observation?
While some split rated bonds may be caused by information opacity problems and others by random errors, investors cannot easily distinguish between the two groups.
SierraPine says it worries that if it buys equipment now to fix the opacity violations, that equipment could become obsolete under the new EPA standards.
Suggesting the microphotographic experiments of the nineteenth-century inventors of photography and recalling the founding relation between photography and science, they also point to the physical operations of contact, enlargement, and projection, as well as the literal meaning of transparency in photography--the transparency of plates, slides, and film--and thus to its paradoxical opacity.
This "something else" gains its power from a paradoxical transparency; the riveting power of her performance comes from the transparent unveiling of her "self" in all its opacity.
Tenders Are Invited For Card, Cem, Opacity, Enhanced Remote Panel Mother Board.
Patchy ground-glass opacity was also present bilaterally.
This course will cover the basics of light scattering (white opacity), techniques for measuring opacity, and methods for determining the opacity efficiency of [TiO.