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a combining form meaning “pus,” used in the formation of compound words: pyogenesis.
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 Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for pyo

  • Mr. Mahch, escuse me by pyo accident earwhilin' yo' colloquial terms.

    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
  • It's natu'al he should cling to the one pyo tie that holds him to us.

    John March, Southerner|George W. Cable

British Dictionary definitions for pyo


before a vowel py-

combining form

denoting puspyosis

Word Origin for pyo-

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

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

Medicine definitions for pyo




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