|the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).|
|opposition to the withdrawal of state support or recognition from an established church, esp. the Anglican Church in 19th-century England.|
pheochromocytoma phe·o·chro·mo·cy·to·ma (fē'ō-krō'mō-sī-tō'mə)
n. pl. phe·o·chro·mo·cy·to·mas or phe·o·chro·mo·cy·to·ma·ta (-mə-tə)
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.
tumour, most often nonmalignant, that causes abnormally high blood pressure because of hypersecretion of the hormones epinephrine and norepinephrine. Usually the tumour is in the medullary cells of the adrenal gland but may occur elsewhere; e.g., in the chromaffin tissues of the ganglia of the nervous system.
Learn more about pheochromocytoma with a free trial on Britannica.com.