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sympathin

/ˈsɪmpəθɪn/
noun
1.
a substance released at certain sympathetic nerve endings: thought to be identical with adrenaline
Word Origin
C20: from sympath(etic) + -in
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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sympathin in Medicine

sympathin sym·pa·thin (sĭm'pə-thĭn)
n.
A substance, such as norepinephrine, that diffuses into the circulation from the terminals of active sympathetic nerves and serves as a chemical mediator.

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