'blood urea nitrogen' definitions:

Definition of 'blood urea nitrogen'

From: GCIDE
  • BUN \BUN\ n. [acronym] (Med.) same as
  • blood urea nitrogen; the concentration of nitrogen in blood present in the form of urea; -- used as a measure of kidney function.
  • Note: Blood usually contains 10 to 15 mg of nitrogen per 100 ml in the form of urea. --Stedman. [PJC]