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epinephrine (n.)

"adrenaline," 1883, from epi- "upon" + Greek nephros "kidney" (see nephron) + chemical suffix -ine (2). So called because the adrenal glands are on the kidneys.

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Definitions of epinephrine

epinephrine (n.)
a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action;
Synonyms: epinephrin / adrenaline / Adrenalin
From wordnet.princeton.edu