n., pl., -ri·a (-rē-ə).
The connective and fatty tissue surrounding a kidney.
[New Latin, from Greek perinephros, fat around the kidneys : peri-, peri- + nephros, kidney.]
perinephral per'i·neph'ral (-nĕf'rəl) or per'i·neph'ri·al (-rē-əl) or per'i·neph'ric (-rĭk) adj.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.