nebula

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Related to nebulae: Planetary nebulae, Emission nebulae, Types of Nebulae

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 ?
Despite their name, planetary nebulae have nothing to do with planets.
He began structuring Nebulae a decade ago and officially launched it in 2013.
Altogether, Hubble read about or looked at 62 different nebulae.
What remains at their centers are white dwarf stars, which emit intense ultraviolet radiation that causes the gas in the nebulae to glow and emit light in brilliant colors.
Gyulbudaghian's Nebula is one of a small number of variable nebulae which the BAA Deep Sky Section has been monitoring for several years.
These nebulae are like chemical factories," says Witt.
The more astronomers studied nebulae (NEB-you-lee), which means more than one nebula, the more familiar some of them looked.
Pictures presented in San Antonio on Tuesday to the American Astronomical Society reveal never-before-seen details of four "planetary nebulae," enormous shells of hot gas thrown off during a star's death throes.
The Bug Nebula, one of the most extreme planetary nebulae known, has a fiery, dying star at its center shrouded by a blanket of icy hailstones.
Planetary nebulae are some of the most beautiful objects in the sky and many being small and bright are ideal targets for lighter summer skies.
At a distance of 650 light-years, Helix is one of the closest known planetary nebulae.
Planetary nebulae are glowing shells of gas around white dwarfs-Sun-like stars in the final stages of their lives.