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 (kăt′ĭ-kō′lə-mēn′, -kô′-)
Any of a group of monoamines, including epinephrine, norepinephrine, and dopamine, that act as neurotransmitters and hormones.


(Biochemistry) any of a group of hormones that are catechol derivatives, esp adrenaline and noradrenaline
[C20: from catechu + -ol1 + amine]


(ˌkæt ɪˈkɒl əˌmin, -ˈkoʊ lə-)

any of a group of chemically related neurotransmitters, as epinephrine and dopamine,with similar effects on the sympathetic nervous system.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.catecholamine - any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland
endocrine, hormone, internal secretion - the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect
noradrenaline, norepinephrine - a catecholamine precursor of epinephrine that is secreted by the adrenal medulla and also released at synapses
Adrenalin, adrenaline, epinephrin, epinephrine - a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action
References in periodicals archive ?
Acetylcholine, in turn, stimulates the release of the catecholamine hormones epinephrine and norepinephrine from the inner layer (i.
When a reaction to stress involves the fight or flight response, there is a cascade of physical effects and release of catecholamine hormones.
David Davies of Binghamton University said that their hypothesis fitted with the observation that heart attack and stroke often occur following an event where elevated levels of catecholamine hormones are released into the blood and tissues, such as occurs during sudden emotional shock, stress or over-exertion.