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a combining form meaning “pus,” used in the formation of compound words:
Also, especially before a vowel, py-.
Origin of pyo-
< Greek, combining form of pýon; akin to Latin pūs pus Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for PYO
Historical Examples
  • It's natu'al he should cling to the one PYO tie that holds him to us.

    John March, Southerner George W. Cable
  • I'm jiss that bole an' rackless I'd resk twenty lives faw jiss one hafe a finger o' PYO whiskey.

    John March, Southerner George W. Cable
  • Faw, Mr. March, the legislatu'e will neveh be PYO anywher's else esceptin' in Suez, an' not evm myseff!

    John March, Southerner George W. Cable
  • Mr. Mahch, escuse me by PYO accident earwhilin' yo' colloquial terms.

    John March, Southerner George W. Cable
British Dictionary definitions for PYO


combining form
denoting pus: pyosis
Word Origin
from Greek puon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for PYO


word-forming element meaning "pus," from comb. form of Greek puon "pus" (see pus).

Online Etymology Dictionary, © 2010 Douglas Harper
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PYO in Medicine

pyo- or py-
Pus: pyoderma.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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