
any clinical and laboratory procedure designed to evaluate various aspects of renal (kidney) capacity and efficiency and to aid in the diagnosis of ... [2 related articles]
Found on
http://www.britannica.com/eb/a-z/k/30

A test in which blood or urine samples are checked for the amounts of certain substances released by the kidneys. A higher- or lower-than-normal amount of a substance can be a sign that the kidneys are not working the way they should. Also called renal function test.
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a test of kidney function, such as of renal clearance or of the glomerular filtration rate; see also specific tests, including Fishberg concentration test, radioisotope renal excretion test, Rehberg test, and D-xylose absorption test. Called also renal function test.
Found on
http://www.encyclo.co.uk/local/21001
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