pheochromocytoma

US:USA pronunciation: respellingUSA pronunciation: respelling(fē′ō krō′mō sī tō′mə)


WordReference Random House Unabridged Dictionary of American English © 2025
phe•o•chro•mo•cy•to•ma  (fē′ō krō′mō sī tō′mə),USA pronunciation n., pl. -mas, -ma•ta (-mə tə).USA pronunciation [Pathol.]
  1. Pathologya tumor of the sympathetic nervous system or adrenal medulla, that produces excess norepinephrine and epinephrine and causes hypertension, headaches, nausea, etc.
  • Greek phai(ós) dusky + -o- + -chrome) + -o- + -cyte) + -oma; compare German Phäochromocytom (1912)
  • pheochromocyte a chromaffin cell of the adrenal medulla (pheochrome chromaffin (1925–30

'pheochromocytoma' also found in these entries (note: many are not synonyms or translations):
phenoxybenzamine - phentolamine

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