from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A usually benign tumor of the adrenal medulla or the sympathetic nervous system in which the affected cells secrete increased amounts of epinephrine or norepinephrine.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A neuroendocrine tumour of the medulla of the adrenal glands
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a vascular tumor of the adrenal gland; hypersecretion of epinephrine results in intermittent or sustained hypertension
pheochromocyte, chromaffin cell (Greek phaios, dusky + chromo- + -cyte) + -oma.(American Heritage® Dictionary of the English Language, Fourth Edition)