halo


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halo

 [ha´lo]
a circular structure, such as a luminous circle seen surrounding an object or light.
Fick's halo a colored circle appearing around a light, experienced by wearers of contact lenses.
halo glaucomato´sus (glaucomatous halo) a narrow light zone surrounding the optic disk in glaucoma.
senile halo a zone of variable width around the optic disk, due to exposure of various elements of the choroid as a result of senile atrophy of the pigmented epithelium.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ha·lo

(hā'lō),
1. A reddish yellow ring surrounding the optic disc, due to a widening of the scleral ring making the deeper structures visible.
2. An anular flare of light surrounding a luminous body or a depigmented ring around a mole.
3. Synonym(s): areola (4)
4. A circular metal band used in a halo cast or halo brace, attached to the skull with pins.
[G. halōs, threshing floor on which oxen trod a circle; the halo round the sun or moon]
Farlex Partner Medical Dictionary © Farlex 2012

ha·lo

(hā'lō)
1. A reddish yellow ring surrounding the optic disc, due to a widening of the scleral ring making the deeper structures visible.
2. An anular flare of light surrounding a luminous body or a depigmented ring around a mole.
See: halo nevus
3. Synonym(s): areola (4) .
4. A circular metal band used in a halo cast or halo brace, attached to the skull with pins.
[G. halōs, threshing floor on which oxen trod a circle; the halo round the sun or moon]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

halo

A coloured ring of light seen around a light source as a result of aberrations, internal reflections, diffraction or scattering. It also appears when the eye is diseased and the cornea is oedematous, as in glaucoma.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
Such forward-looking information and forward-looking statements are not representative of historical facts or information or current condition, but instead represent only Halo's beliefs regarding future events, plans or objectives, many of which, by their nature, are inherently uncertain and outside of Halo's control.
(https://www.gamesradar.com/halo-infinite-sound-clip/) GamesRadar noted that Cortana has been "literally scatterbrained" since the end of "Halo 4." While she played a different role in "Halo 5: Guardians," the new teaser could imply that she has found a fragment of herself dating from long ago, or that it's another Cortana discovering traces of who she was and what she did in "Halo 5." It's unknown at the moment.
The Taitung Weather Station said that a "halo" is an atmospheric optical phenomenon that can occur around the sun or moon and is visible as a wheel of light.
* Right now, PC players will get a chance to play Halo: The Master Chief Collection.
"Halo's expertise in oral solids, liquids, creams and ointments fits well with our [current] business and brings a substantial new customer base and pipeline of small molecule products," Cambrex CEO Steve Klosk said.
That's not to say that Halo is "healthy" and Enlightened is "good for you," as they claim.
For more than a decade, ambitious all-sky surveys have revealed dozens of wraithlike stellar streams gliding through the halo of the Milky Way Galaxy; meanwhile, new techniques have revealed similar features around other nearby galaxies.
HALO was founded by Bill Schmid, who lost his first-born child to SIDS (Sudden Infant Death Syndrome).
"Lee and Barry have proven track records of growing and improving companies in the pharmaceutical and CDMO sector," said Aaron Davenport, chairman, Halo Pharmaceutical, and managing director, SK Capital, Halo's majority owner.
Bang |Needler Halo Wars 2 has been a long time coming.
En terminos practicos, la medicion de los halos internos no es totalmente conveniente debido a la variabilidad que presentan, por ello es preferible la medicion del halo externo (H5) ya que es el unico del que se tiene certeza de su presencia y tamano.