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pheochromocytoma

[fee-oh-kroh-moh-sahy-toh-muh]
noun, plural phe·o·chro·mo·cy·to·mas, phe·o·chro·mo·cy·to·ma·ta [fee-oh-kroh-moh-sahy-toh-muh-tuh] /ˌfi oʊˌkroʊ moʊ saɪˈtoʊ mə tə/. Pathology.
  1. a tumor of the sympathetic nervous system or adrenal medulla, that produces excess norepinephrine and epinephrine and causes hypertension, headaches, nausea, etc.
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Origin of pheochromocytoma

1925–30; pheochromocyte a chromaffin cell of the adrenal medulla (pheochrome chromaffin (< Greek phai(ós) dusky + -o- + -chrome) + -o- + -cyte) + -oma; compare German Phäochromocytom (1912)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

pheochromocytoma in Medicine

pheochromocytoma

(fē′ō-krō′mō-sī-tōmə)
n. pl. phe•o•chro•mo•cy•to•mas
  1. 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.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.