plural pheos
medical : pheochromocytoma
There are rare tumors—pheochromocytoma—that secrete high levels of adrenaline, and such tumors can cause this combination of high blood pressure and orthostatic hypotension. … But if the patient did have a "pheo" (as it's called), that could explain why her symptoms became so much worse after her heart attack. Lisa Sanders

Word History

Etymology

by shortening

First Known Use

1982, in the meaning defined above

Time Traveler
The first known use of pheo was in 1982

Dictionary Entries Near pheo

Cite this Entry

“Pheo.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pheo. Accessed 9 Dec. 2022.

Medical Definition

pheo

noun
plural pheos
: pheochromocytoma
There are rare tumors—pheochromocytomas—that secrete high levels of adrenaline, and such tumors can cause this combination of high blood pressure and orthostatic hypotension. … But if the patient did have a "pheo" (as it's called), that could explain why her symptoms became so much worse after her heart attack. Lisa Sanders
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