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Answer for the clue "Any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland ", 13 letters:
catecholamine

Word definitions for catecholamine in dictionaries

WordNet Word definitions in WordNet
n. any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
type of hormone, from catechol (1880), from catechu , 17c. name for an astringent substance used in medicines, dyeing, etc., which apparently is from Malay kachu .

Wiktionary Word definitions in Wiktionary
n. (context biochemistry English) Any of a class of aromatic amines derived from pyrocatechol that are hormones produced by the adrenal gland.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
catecholamine \catecholamine\ n. [catechol + amine.] any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland. They function as nerotransmitters in the sympathetic nervous system. Also, any ...

Wikipedia Word definitions in Wikipedia
A catecholamine ( CA ) is a monoamine , an organic compound that has a catechol ( benzene with two hydroxyl side groups at carbons 1 and 2) and a side-chain amine . Catechol can be either a free molecule or a substituent of a larger molecule, where it represents ...

Usage examples of catecholamine.

When she was alone, she could feelalmost regretfullythe spasm of annoyance subsiding, the catecholamines within her skull and the adrenaline in her bloodstream returning to their usual levels.

It's a classic pharmacological analogue, similar to inserting permanent stimulus molecules in the brain's opiate-receptor sitesexcept that the CI technology uses the neurosystem's own catecholamines, so the process is even more efficient.

Stress is frequently measured by the amount of corticosteroids and catecholamines (adrenalin and nor-adrenalin, for example) found in the blood and urine.

Your work with tyrosine hydroxylase interaction with catecholamines is little short of rev­olutionary.

Your work with tyrosine hydroxylase interaction with catecholamines is little short of rev­.