[kat-i-kol-uh-meen, -koh-luh-]
noun Biochemistry.
any of a group of chemically related neurotransmitters, as epinephrine and dopamine, that have similar effects on the sympathetic nervous system.

1950–55; catechol + -amine Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
catecholamine (ˌkætəˈkɒləˌmiːn)
any of a group of hormones that are catechol derivatives, esp adrenaline and noradrenaline
[C20: from catechu + -ol1 + amine]

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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Word Origin & History

type of hormone, from catechol (1880), from catechu, which apparently is from Malay kachu, the word for an astringent substance used in medicines, dyeing, etc.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

catecholamine cat·e·cho·la·mine (kāt'ĭ-kō'lə-mēn', -kô'-)
Any of a group of amines composed of a pyrocatechol molecule and the aliphatic portion of an amine that have important physiological effects as neurotransmitters and hormones, such as epinephrine, norepinephrine, and L-dopa.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
catecholamine   (kāt'ĭ-kō'lə-mēn', -kô'-)  Pronunciation Key 
Any of a group of amines derived from catechol that have important physiological effects as neurotransmitters and hormones and include epinephrine, norepinephrine, and dopamine.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Adrenal medulla, catecholamines, and pheochromocytoma.
We can't be afraid of the catecholamines and the peak in blood pressure in the morning.
The body's first response is a surge of energy, the release of a cascade of neurotransmitters called catecholamines.
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