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[gloo-kuh-gon] /ˈglu kəˌgɒn/
noun, Biochemistry.
a hormone secreted by the pancreas that acts in opposition to insulin in the regulation of blood glucose levels.
Origin of glucagon
1923; probably gluc- + Greek ágōn present participle of ágein to lead, drive; see -agogue Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for glucagon


/ˈɡluːkəˌɡɒn; -ɡən/
a polypeptide hormone, produced in the pancreas by the islets of Langerhans, that stimulates the release of glucose into the blood Compare insulin
Word Origin
C20: from gluc(ose) + -agon, perhaps from Greek agein to lead
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 glucagon

1923, from gluco- + Greek agon, present participle of agein "to lead" (see act (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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glucagon in Medicine

glucagon glu·ca·gon (glōō'kə-gŏn')
A polypeptide hormone secreted by alpha cells that initiates a rise in blood sugar levels by stimulating the breakdown of glycogen by the liver.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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glucagon in Science
A polypeptide hormone produced by the pancreas that stimulates an increase in blood glucose levels, thus opposing the action of insulin.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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