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halo

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ha⋅lo

[hey-loh] noun, plural -los, -loes, verb, -loed, -lo⋅ing.
–noun
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)
6. to surround with a halo.
–verb (used without object)
7. to form a halo.

Origin:
1555–65; < L, acc. of halōs circle round sun or moon < Gk hálōs such a circle, disk, orig. threshing floor

halo-

a combining form meaning “salt,” used in the formation of compound words (halophyte); sometimes specialized as a combining form of halogen (halothane).
Also, especially before a vowel, hal-.


Origin:
< Gk, comb. form of háls salt
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To halo
ha·lo   (hā'lō)   
n.   pl. ha·los or ha·loes
    1. A circular band of colored light around a light source, as around the sun or moon, caused by the refraction and reflection of light by ice particles suspended in the intervening atmosphere.

    2. Something resembling this band.

  1. A luminous ring or disk of light surrounding the heads or bodies of sacred figures, such as saints, in religious paintings; a nimbus.

  2. The aura of majesty or glory surrounding a person or thing that is regarded with reverence, awe, or sentiment.

tr.v.   ha·loed, ha·lo·ing, ha·loes
To encircle with or as if with a halo.

[Medieval Latin halō, from accusative of Latin halōs, from Greek, threshing floor, disk of or around the sun or moon.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

halo 
1563, from L. halo (acc.), from Gk. 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 1646.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: ha·lo
Pronunciation: 'hA-(")lO
Function: noun
Inflected Form: plural halos or haloes
1 : acircle of light appearing to surround a luminous body; especially : one seen as the result of the presence of glaucoma
2 : a differentiated zone surrounding acentral object halo around a boil>
3 : the aura of glory, veneration, or sentiment surrounding an idealized person or thing
4 : an orthopedicdevice used to immobilize the head and neck (as to treat fracture of neck vertebrae) that consists of a metal band placed around the head and fastened to the skull usually with metal pins and that isattached by extensions to an inflexible vest called also halo brace
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

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.

halo- or hal-
pref.

  1. Salt: halophilic.

  2. Halogen: halide.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
halo   (hā'lō)  Pronunciation Key 
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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