Etymology
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catecholamine (n.)

type of hormone, 1960, from catechol (1880), from catechu, 17c. name for an astringent substance used in medicines, dyeing, etc., which apparently is from Malay (Austronesian) kachu.

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Definitions of catecholamine

catecholamine (n.)
any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland;
From wordnet.princeton.edu