nonprotein nitrogen
McGraw-Hill Science & Technology Dictionary:
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nonprotein nitrogen
(¦nän¦prō′tēn ′nī·trə·jən)
(biochemistry) The nitrogen fraction in the body tissues, excretions, and secretions, not precipitated by protein precipitants.
American Heritage Stedman's Medical Dictionary:
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non·pro·tein nitrogen
(nŏn-prō'tēn', -tē-ĭn)
n.
n.
(Abbr. NPN) The nitrogen content of substances other than protein in blood, tissues, and waste materials.
Mosby's Dental Dictionary:
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nonprotein nitrogen
n
NPN
The nitrogen of whole blood or serum exclusive of that of the proteins. The concentration of nonprotein nitrogen is a gross measure of renal function. The upper limit of normal is 35 mg/100 ml.
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McGraw-Hill Dictionary of Scientific and Technical Terms. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved.
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