Medical Definition of Alkaline phosphatase

Alkaline phosphatase: An enzyme that liberates phosphate under alkaline conditions and is made in liver, bone, and other tissues. Alkaline phosphatase can be measured in a routine blood test. Abnormally high serum levels of alkaline phosphatase may indicate bone disease, liver disease, or bile duct obstruction.

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Last Editorial Review: 5/13/2016

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