Inflammation of the kidney and its pelvis, caused by bacterial infection.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "pyelonephritis" in a sentence
"Infection involving mainly the kidney is called pyelonephritis, or an upper urinary tract infection."
"You could have pyelonephritis which is the inflammation of the renal pelvis and renal medulla"
"Reflux can cause kidney infections (pyelonephritis), which can lead to permanent damage to the kidneys."