gel

[jel]
noun
1.
Physical Chemistry. a semirigid colloidal dispersion of a solid with a liquid or gas, as jelly, glue, etc.
2.
Theater, gelatin ( def 5 ).
3.
Biochemistry. a semirigid polymer, as agarose, starch, cellulose acetate, or polyacrylamide, cast into slabs or cylinders for the electrophoretic separation of proteins and nucleic acids.
verb (used without object), gelled, gelling.
4.
to form or become a gel.
5.
jell ( def 2 ).

Origin:
1895–1900; shortening of gelatin

degel, verb (used with object), degelled, degelling.
nongelling, adjective
regel, verb (used without object), regelled, regelling.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
gel (dʒɛl)
 
n
1.  a semirigid jelly-like colloid in which a liquid is dispersed in a solid: nondrip paint is a gel
2.  See hair gel
3.  informal theatre See gelatine
 
vb , gels, gelling, gelled
4.  to become or cause to become a gel
5.  a variant spelling of jell
 
[C19: by shortening from gelatine]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

gel
1899, as a chemical term, short for gelatin, perhaps infl. by jell. The invention of this word is credited to Thomas Graham, who died in 1869. Hair-styling sense is from 1958. The verb meaning "to become a gel" is from 1917; fig. sense is from 1958.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

gel (jěl)
n.
A colloid in which the disperse phase combines with the dispersion medium to produce a semisolid material. v. gelled, gel·ling, gels

  1. To become a gel.

  2. To convert a sol into a gel.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Slang Dictionary

gel definition

[dʒɛl]
  1. in.
    to relax and let one's hair down. : I've got to go home and gel for a while. Things are too stressful just now.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw-Hill Education.
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American Heritage
Abbreviations & Acronyms
gel
gelatin
GEL
Georgia—lari (currency)
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Tal wears a tight-fitting button-down, and as usual his hair is heavily gelled
  in spikes.
As he entered the courtroom with gelled hair and a gray suit, he still had a
  shadow of swagger left from the glory days.
Areas exposed to light gelled, while those under the cutout did not.
When waterworks treat water with aluminum, the aluminum gels out of the water
  and fixes contaminants in the gelled sludge.
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