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halo

[hey-loh] /ˈheɪ loʊ/
noun, plural halos, haloes.
1.
Also called nimbus. a geometric shape, usually in the form of a disk, circle, ring, or rayed structure, traditionally representing a radiant light around or above the head of a divine or sacred personage, an ancient or medieval monarch, etc.
2.
an atmosphere or quality of glory, majesty, sanctity, or the like:
the halo around Shakespeare's works; She put a halo around her son.
3.
Meteorology. any of a variety of bright circles or arcs centered on the sun or moon, caused by the refraction or reflection of light by ice crystals suspended in the earth's atmosphere and exhibiting prismatic coloration ranging from red inside to blue outside (distinguished from corona).
4.
Astronomy. a spherical cloud of gas clusters and stars that form part of a spiral galaxy.
5.
an undesirable bright or dark ring surrounding an image on the fluorescent screen of a television tube, due to some fault either in transmission or reception.
verb (used with object), haloed, haloing.
6.
to surround with a halo.
verb (used without object), haloed, haloing.
7.
to form a halo.
Origin
1555-1565
1555-65; < Latin, accusative of halōs circle round sun or moon < Greek hálōs such a circle, disk, orig. threshing floor
Related forms
unhaloed, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for halos
  • Only the gravitational pull of these galaxies' unseen halos of dark matter holds those stars in.
  • Ice halos are rings and arcs of light that appear when sunlight is deflected through ice crystals.
  • Onboard software sharpens the footage but also introduces halos and exaggerated edges.
  • Their fiery halos relieved the green monotone that by late summer ruled the garden.
  • halos are pretty if you are a meteorologist, but ugly if you are an astronomer.
  • Once you point out halos are natural, they'll point out light bleed in the photos.
British Dictionary definitions for halos

halo

/ˈheɪləʊ/
noun (pl) -loes, -los
1.
a disc or ring of light around the head of an angel, saint, etc, as in painting or sculpture
2.
the aura surrounding an idealized, famous, or admired person, thing, or event
3.
a circle of light around the sun or moon, caused by the refraction of light by particles of ice
4.
(astronomy) a spherical cloud of stars surrounding the Galaxy and other spiral galaxies
verb -loes, -los, -loing, -loed
5.
to surround with or form a halo
Derived Forms
halo-like, adjective
Word Origin
C16: from Medieval Latin, from Latin halōs circular threshing floor, from Greek
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for halos

halo

n.

1560s, from Latin halo (nominative halos), from Greek halos "disk of the sun or moon, ring of light around the sun or moon" (also "threshing floor" and "disk of a shield"), of unknown origin. Sense of "light around the head of a holy person or deity" first recorded 1640s. As a verb from 1801.

Online Etymology Dictionary, © 2010 Douglas Harper
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halos in Medicine

halo ha·lo (hā'lō)
n. pl. ha·los or ha·loes

  1. A reddish yellow ring surrounding the optic disk, caused by an expansion of the scleral ring that makes the deeper structures visible.

  2. Glaucomatous halo.

  3. A ring of light surrounding a luminous body.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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halos in Science
halo
  (hā'lō)   
A hazy ring of colored light in the sky around the Sun, Moon, or a similar bright object. A halo is caused by the reflection and refraction of light through atmospheric ice crystals.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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