nebula


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nebula

 [neb´u-lah]
1. slight corneal opacity.
2. an oily preparation for use in a nebulizer.

neb·u·la (nebul.),

, pl.

neb·u·lae

(neb'yū-lă, -lē),
1. A translucent foglike opacity of the cornea.
2. A class of oily preparations, intended for application by atomization.
3. A spray.
[L. fog, cloud, mist]

nebula

/neb·u·la/ (neb´u-lah) pl. ne´bulae   [L.]
1. a slight corneal opacity.
2. a preparation, particularly an oily preparation, for use in a nebulizer.

nebula

(nĕb′yə-lə)
n. pl. nebu·lae (-lē′) or nebu·las
1. Astronomy
a. A diffuse cloud of interstellar dust or gas or both, visible as luminous patches or areas of darkness depending on the way the mass absorbs or reflects incident light or emits its own light.
b. A galaxy. No longer in technical use.
2. Medicine
a. A cloudy spot on the cornea.
b. A liquid preparation for use in a nebulizer.

neb′u·lar adj.

nebula

[neb′yələ] pl. nebulae
Etymology: L, cloud
1 a slight corneal opacity or scar that seldom obstructs vision and that can be seen only by oblique illumination.
2 a murkiness in the urine.
3 an oily concoction that is applied with an atomizer.
4 mass of interstellate dusts.

neb·u·la

, pl. nebulae (neb'yū-lă, -lē)
1. A translucent foglike opacity of the cornea.
2. A spray.
[L. fog, cloud, mist]

nebula

A cloudy spot on the CORNEA of the eye. A central nebula can severely interfere with clear vision.

leukoma

Dense, white, corneal opacity caused by scar tissue. A localized leukoma appears as a whitish scar surrounded by normal cornea. A generalized leukoma involves the entire cornea, which appears white, often with blood vessels coursing over its surface. Visual impairment depends on the location and extent of the leukoma. If the opacity is faint, it is called a nebula. Note: also spelt leucoma. See hyperacuity; corneal ulcer.

nebula

1. a slight corneal opacity.
2. an oily preparation for use in an atomizer.
References in periodicals archive ?
The Eagle Nebula is also known as Messier 16 - or M16 for short.
In 1916, Edwin Hubble discovered that the nebula itself varied in shape and brightness.
Var of animation of Bubble Nebula, or NGC 7635 prepared by NASA
The Boomerang is a pre-planetary nebula, representing the stage in a star's life immediately preceding the planetary nebula phase, when the central star is not yet hot enough to emit sufficient ultraviolet radiation to produce the characteristic glow.
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Figure 2 shows the lightcurves of both the star and the nebula from 2010 March to 2012 March.
Although the dominant color of the Orion Nebula in most photos is pink or reddish, our eyes are not particularly sensitive to this color at low light levels.
But observations from the Arecibo radio telescope in Puerto Rico show those from the Crab Nebula are not.
A main goal, says Robberto, is to measure the masses and ages of all the stars in the nebula.
In Harlan Ellison's "Goodbye to All That," Colman searches for the wisdom of life in the Himalayas while in tribute to Robert Silverberg as the Nebula Grand Master, Silverberg's vintage story "Sundance," a fascinating tale of mind editing, genocide, and anthropological study, is offered to readers.
We've said that a nebula can be lit up by stars or that stars can make the nebula glow, but there is a third way to see a nebula.
Little confessed that he's not very well versed in astronomy - he didn't know, for instance, which galaxy the Eagle Nebula was in - but he was so impressed by a photograph of it that he wanted to draw it.